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www.gennum.com gs1559 hd-linx? ii multi-rate deserializer with loop-through cable driver gs1559 data sheet 30572 - 4 july 2005 1 of 74 key features ? smpte 292m and smpte 259m-c compliant descrambling and nrzi nrz decoding (with bypass) ? dvb-asi sync word detection and 8b/10b decoding ? auto-configuration for hd-sdi, sd-sdi and dvb-asi ? serial loop-through cable driver output selectable as reclocked or non-reclocked ? dual serial digital input buffers with 2 x 1 mux ? integrated serial digital signal termination ? integrated reclocker ? automatic or manual rate selection / indication (hd/sd) ? descrambler bypass option ? user selectable addition al processing features including: ? crc, trs, anc data checksum, line number and edh crc error detection and correction ? programmable anc data detection ? illegal code remapping ? internal flywheel for noise immune h, v, f extraction ? fifo load pulse ? 20-bit / 10-bit cmos parallel output data bus ? 148.5mhz / 74.25mhz / 27mhz / 13.5mhz parallel digital output ? automatic standards detection and indication ? 1.8v core power supply and 3.3v charge pump power supply ? 3.3v digital i/o supply ? jtag test interface ? available in a pb-free package ? small footprint (11mm x 11mm) applications ? smpte 292m serial digital interfaces ? smpte 259m-c serial digital interfaces ? dvb-asi serial digital interfaces description the gs1559 is a reclocking deserializer with a serial loop-through cable driver. when used in conjunction with the gs1574 automatic cable equalizer and the go1525 voltage controlled oscillator, a receive solution can be realized for hd-sdi, sd-sdi and dvb-asi applications. in addition to reclocking and deserializing the input data stream, the gs1559 performs nrzi-to-nrz decoding, descrambling as per smpte 292m/259m-c, and word alignment when operating in smpte mode. when operating in dvb-asi mode, the device will word align the data to k28.5 sync characters and 8b/10b decode the received stream. two serial digital input buffers are provided with a 2x1 multiplexer to allow the device to select from one of two serial digital input signals. the integrated reclocker features a very wide input jitter tolerance of 0.3 ui (total 0.6 ui), a rapid asynchronous lock time, and full compliance with dvb-asi data streams. an integrated cable driver is provided for serial input loop-through applications and can be selected to output either buffered or reclocked data. this cable driver also features an output mute on loss of signal, high impedance mode, adjustabl e signal swing, and automatic dual slew-rate selection depending on hd/sd operational requirements. the gs1559 also includes a range of data processing functions such as error detection and correction, automatic standards detection, and edh support. the device can also detect and extract smpte 352m payload identifier packets and independently identify the received video standard. this information is read from internal registers via the host interface port. line-based crc errors, line number errors, trs errors, edh crc errors and ancillary data checksum errors can all be detected. a single ?data_error? pin is provided which is a logica l 'or'ing of all detectable errors. individual error status is stored in internal ?error_status? registers. finally, the device can correct detected errors and insert new trs id words, line-based crc words, ancillary data checksum words, edh crc words, and line numbers. illega l code re-mapping is also available. all processing functions may be individually enabled or disabled via host interface control.
gs1559 data sheet 30572 - 4 july 2005 2 of 74 gs1559 functional block diagram ddi_1 term 1 term 2 ddi_1 ddi_2 ddi_2 reclocker sdo sdo sdo_en/dis rset s->p smpte de- scramble, word alignment and flywheel h v f dout[19:0] ip_sel carrier_detect rc_byp (o/p mute) pll_lock reset_trst asi_sync_det host interface / jtag test cs_tms sclk_tck sdin_tdi sdout_tdo fifo_ld data_error yanc canc reset jtag/host ioproc_en/dis crc check line mumber check trs check csum check anc data detection k28.5 sync detect, dvb-asi word alignment and 8b/10b decode crc correct line mumber correct trs correct csum correct edh check & correct illegal code re- map 20bit/10bit i/o buffer & mux fw_en/dis cp_cap dvb_asi pll_lock vco vco lf lb_cont vco_v cc vco_gnd sd/hd master/slave pclk locked lock detect cd1 cd2 smpte_bypass smpte_sync_det rclk_ctrl rclk_bypass
gs1559 data sheet 30572 - 4 july 2005 3 of 74 contents key features.................................................................................................................1 applications................................................................................................................... 1 description .................................................................................................................... 1 1. pin out .................................................................................................................... .5 1.1 pin assignment ...............................................................................................5 1.2 pin descriptions ..............................................................................................6 2. electrical characteristics ........................................................................................16 2.1 absolute maximum rating s ..........................................................................16 2.2 dc electrical characteristics ............. ...........................................................16 2.3 ac electrical characteristics........... ..............................................................18 2.4 solder reflow profiles...................................................................................20 3. input/output circuits ..............................................................................................21 3.1 host interface map........................................................................................23 3.1.1 host interface map (r/w confi gurable registers) .............................24 3.1.2 host interface map (read only r egisters) ....... .............. ........... .........25 4. detailed description ...............................................................................................26 4.1 functional overview .....................................................................................26 4.2 serial digital input .........................................................................................26 4.2.1 input signal selectio n .........................................................................27 4.2.2 carrier detect input ............................................................................27 4.2.3 single input configuration ..................................................................27 4.3 serial digital reclocker.................................................................................27 4.3.1 external vco......................................................................................28 4.3.2 loop bandwidth ........... .............. .............. ............ ........... ........... .........28 4.4 serial digital loop-through output ..............................................................28 4.4.1 output swing ......................................................................................29 4.4.2 reclocker bypass cont rol ..................................................................29 4.4.3 serial digital output mute...................................................................30 4.5 serial-to-parallel conversion ............ ...........................................................30 4.6 modes of operation......................................................................................31 4.6.1 lock detect.........................................................................................31 4.6.2 master mode.......................................................................................32 4.6.3 slave mode.........................................................................................32 4.7 smpte functionality ....................................................................................34 4.7.1 smpte descrambling and word alignment .......................................34 4.7.2 internal flywheel........................ .........................................................34 4.7.3 switch line lock handling..................................................................35 4.7.4 hvf timing signal generation ..... ......................................................39 4.8 dvb-asi functionality ..................................................................................41 4.8.1 dvb-asi 8b/10b decoding and wo rd alignment......... .............. .........41
gs1559 data sheet 30572 - 4 july 2005 4 of 74 4.8.2 status signal outputs .........................................................................41 4.9 data through mode ......................................................................................42 4.10 additional processing functions ........ .........................................................42 4.10.1 fifo load pulse...... .............. .............. .............. ........... ........... .........42 4.10.2 ancillary data dete ction and indication .......... .............. ........... .........43 4.10.3 smpte 352m payload identifier. ......................................................46 4.10.4 automatic video standard and da ta format detection ....................47 4.10.5 error detection and indication .... .............. .............. .............. ............51 4.10.6 error correction and insertion .... .............. .............. .............. ............57 4.10.7 edh flag detection .................... ......................................................59 4.11 parallel data outputs....................... ...........................................................61 4.11.1 parallel data bus buffers......... .........................................................61 4.11.2 parallel output in smpte mode .......................................................62 4.11.3 parallel output in dvb-asi mode .....................................................62 4.11.4 parallel output in data-through mode .............................................62 4.11.5 parallel output clock (pclk) ...........................................................63 4.12 gspi host interface ....................................................................................64 4.12.1 command word description.......... .............. .............. .............. .........64 4.12.2 data read and write timing ............................................................65 4.12.3 configuration and status registers ..................................................66 4.13 jtag...........................................................................................................67 4.14 device power up ........................................................................................68 4.15 device reset...............................................................................................68 5. application reference design .................. ..............................................................69 5.1 typical application circuit (part a) ...............................................................69 5.2 typical application circuit (part b) ...............................................................70 6. references & relevant standards ........... .............. .............. .............. ........... .........71 7. package & ordering informa tion............................................................................72 7.1 package dimensions ....................................................................................72 7.2 packaging data.............................................................................................73 7.3 ordering information .....................................................................................73 8. revision history .....................................................................................................74
gs1559 data sheet 30572 - 4 july 2005 5 of 74 1. pin out 1.1 pin assignment 1 3 2 45 6 7 8 9 10 a b c d e f g h j k locked pclk lb_ cont nc rc_byp dout19 dout18 dout17 dout16 dout14 dout12 dout10 dout8 dout6 dout4 dout2 dout1 dout15 dout13 dout11 dout9 dout7 dout5 dout3 dout0 jtag/ host sd/hd io_vdd io_vdd io_gnd fifo_ld h io_vdd core _vdd io_gnd core _vdd core _gnd core _gnd data_ error fw_en/ /dis dvb_asi smpte_ bypass master/ slave nc nc 20bit/ 10bit sdin _tdi sclk _tck sdout _tdo cs_ tms reset _trst nc nc nc cd_vdd sdo_en /dis ioproc _en/dis rset nc nc nc nc buff _vdd nc nc nc nc nc cd1 cp_cap term1 ddi1 ddi1 ddi2 ddi2 term2 sdo sd0 vco_ vcc vco_ gnd lf vco vco cp_vdd cp_gnd pd_vdd pd/buff _gnd yanc ip_sel canc nc cd2 nc nc nc v io_gnd cd_gnd f nc
gs1559 data sheet 30572 - 4 july 2005 6 of 74 1.2 pin descriptions table 1-1: pin descriptions pin number name timing type description a1 lf analog output control voltage to external vo ltage controlled oscillator. nominally +1.25v dc. a2 vco_vcc ? output power power supply for the external voltage controlled oscillator. connect to pin 7 of the go1525. this pin is an output. should be isolated from all other power supplies. a3 vco_gnd ? output power ground reference for the external voltage controlled oscillator. connect to pins 2, 4, 6, and 8 of the go1525. this pin is an output. should be isolated from all other grounds. a4, a5 vco , vco analog input differential inputs for the external vco referenc e signal. for single ended devices such as the go1525, vco should be ac coupled to vco_gnd. vco is nominally 1.485ghz. a6, b5, b6, c4, c5, d2, d3, d7, e3, e7, f2, f3, f7, g2, g3, g7, h3, j2, j3, j4, nc ? ? no connect. a7 pclk ? output parallel data bus clock signal levels are lvcmos/lvttl compatible. hd 20-bit mode pclk = 74.25mhz or 74.25/1.001mhz hd 10-bit mode pclk = 148.5mhz or 148.5/1.001mhz sd 20-bit mode pclk = 13.5mhz sd 10-bit mode pclk = 27mhz a8, e8, k8 io_vdd ? power power supply connection for digital i/o buffers. connect to +3.3v dc digital.
gs1559 data sheet 30572 - 4 july 2005 7 of 74 a10, a9, b10, b9, c10, c9, d10, d9, e10, e9 dout[19:10] synchronous with pclk output parallel data bus signal levels are lvcmos/lvttl compatible. dout19 is the msb and dout10 is the lsb. hd 20-bit mode sd/hd = low 20bit/10bit = high luma data output in smpte mode smpte_bypass = high dvb_asi = low data output in data-through mode smpte_bypass = low dvb_asi = low hd 10-bit mode sd/hd = low 20bit/10bit = low multiplexed luma and chroma data output in smpte mode smpte_bypass = high dvb_asi = low data output in data-through mode smpte_bypass = low dvb_asi = low sd 20-bit mode sd/hd = high 20bit/10bit = high luma data output in smpte mode smpte_bypass = high dvb_asi = low data output in data-through mode smpte_bypass = low dvb_asi = low dvb-asi data in dvb-asi mode smpte_bypass = low dvb_asi = high sd 10-bit mode sd/hd = high 20bit/10bit = low multiplexed luma and chroma data output in smpte mode smpte_bypass = high dvb_asi = low data input in data through mode smpte_bypass = low dvb_asi = low dvb-asi data in dvb-asi mode smpte_bypass = low dvb_asi = high b1 cp_cap analog input pll lock time constant capacitor connection. normally connected to vco_gnd through 2.2nf. b2 cp_vdd ? power power supply connection for the charge pump. connect to +3.3v dc analog. b3 cp_gnd ? power ground connection for the charge pump. connect to analog gnd. b4 lb_cont analog input control voltage to set the loop bandwidth of the integrated reclocker. normally connected to vco_gnd through 40k . table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 8 of 74 b7 fw_en/dis non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to enable or disable the noise immune flywheel of the device. when set high, the internal flywheel is enabled. this flywheel is used in the extraction and generation of trs timing signals, in automatic video standards detection, and in manual switch line lock handling. when set low, the internal flywheel is disabled and trs correction and insertion is unavailable. b8, f8, j8 io_gnd ? power ground connection for digital i/o buffers. connect to digital gnd. c1 buff_vdd ? power power supply connection for t he serial digital input buffers. connect to +1.8v dc analog. c2 pd_vdd ? power power supply connection for the phase detector. connect to +1.8v dc analog. c3 pdbuff_gnd ? power ground connection for the phase detector and serial digital input buffers. connect to analog gnd. c6 master/slave non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to determine the input / output selection for the dvb_asi, sd/hd , rc_byp and smpte_bypass pins. when set high, the gs1559 is set to operate in master mode where dvb_asi, sd/hd , rc_byp and smpte_bypass become status signal output pins set by the device. in th is mode, the gs1559 will automatically detect, reclock, deserialize and process sd smpte, hd smpte, or dvb-asi input data. when set low, the gs1559 is set to operate in slave mode where dvb_asi, sd/hd , rc_byp and smpte_bypass become control signal input pins. in this mode, the applicat ion layer must set these external device pins for the correct reception of either smpte or dvb-asi data. slave mode also supports the recl ocking and deserializing of data not conforming to smpte or dvb-asi streams. c7 rc_byp non synchronous input /output control signal input / status signal output signal levels are lvcmos/lvttl compatible. this pin will be an input set by the appl ication layer in slave mode, and will be an output set by the device in master mode. master mode (master/slave = high) the rc_byp signal will be high only wh en the device has successfully locked to a smpte or dvb-asi compliant input data stream. in this case, the serial digital loop-through output will be a reclocked version of the input. the rc_byp signal will be low whenever the input does not conform to a smpte or dvb-asi compliant data stream. in this case, the serial digital loop-through output will be a buffered version of the input. slave mode (master/slave = low) when set high, the serial digital output will be a reclocked version of the input signal regardless of whether t he device is in smpte, dvb-asi or data-through mode. when set low, the serial digital output will be a buffered version of the input signal in all modes. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 9 of 74 c8 yanc synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. used to indicate the presence of ancillary data in the video stream. hd mode (sd/hd = low) the yanc signal will be high when the device has detected vanc or hanc data in the luma video stream and low otherwise. sd mode (sd/hd = low) for 20-bit demultiplexed data (20bit/10bit = high), the yanc signal will be high when vanc or hanc data is detected in the luma video stream and low otherwise. for 10-bit multiplexed data (20bit/10bit = low), the yanc signal will be high when vanc or hanc data is detected anywhere in the data stream and low otherwise. d1, e1 ddi1, ddi1 analog input differential input pair for serial digital input 1. d4 ip_sel non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to select ddi1 / ddi1 or ddi2 / ddi2 as the serial digital input signal, and cd1 or cd2 as the carrier detect input signal. when set high, ddi1 / ddi1 is selected as the serial digital input and cd1 is selected as the carrier detect input signal. when set low, ddi2 / ddi2 serial digital input and cd2 carrier detect input signal is selected. d5 dvb_asi non synchronous input / output control signal input / status signal output signal levels are lvcmos/lvttl compatible. this pin will be an input set by the appl ication layer in slave mode, and will be an output set by the device in master mode. master mode (master/slave = high) the dvb_asi signal will be high on ly when the device has locked to a dvb-asi compliant data stream. it will be low otherwise. slave mode (master/slave = low) when set high in conjunction with sd/hd = high and smpte_bypass = low, the device will be confi gured to operate in dvb-asi mode. when set low, the device will not s upport the decoding or word alignment of received dvb-asi data. d6 locked synchronous with pclk output status signal output signal levels are lvcmos / lvttl compatible. the locked signal will be high whenever the device has correctly received and locked to smpte compliant data in smpte mode or dvb-asi compliant data in dvb-asi mode. it will be low otherwise. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 10 of 74 d8 canc synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. used to indicate the presence of ancillary data in the video stream. hd mode (sd/hd = low) the canc signal will be high when the device has detected vanc or hanc data in the chroma video stream and low otherwise. sd mode (sd/hd = low) for 20-bit demultiplexed data (20bit/10bit = high), the canc signal will be high when vanc or hanc data is detected in the chroma video stream and low otherwise. for 10-bit multiplexed data (20bit/10bit = low), the canc signal will be high when vanc or hanc data is detected anywhere in the data stream and low otherwise. e2 term1 analog input termination for serial digital input 1. ac couple to eq_gnd. e4 sd/hd non synchronous input / output control signal input / status signal output signal levels are lvcmos/lvttl compatible. this pin will be an input set by the appl ication layer in slave mode, and will be an output set by the device in master mode. master mode (master/slave = high) the sd/hd signal will be low whenever the received serial digital signal is 1.485gb/s or 1.485/1.001gb/s. the sd/hd signal will be high whenever t he received serial digital signal is 270mb/s. slave mode (master/slave = low) when set low, the device will be configured for the reception of 1.485gb/s or 1.485/1.001gb/s signals only and will not lock to any other serial digital signal. when set high, the device will be conf igured for the reception of 270mb/s signals only and will not lock to any other serial digital signal. note: when in slave mode, reset the device after the sd/ hd input has been initially configured, and after each subsequent sd/hd data rate change. note: this pin has an internal pull-up resistor of 100k. e5, f5 core_gnd ? power ground connection for the digital core logic. connect to digital gnd. e6, f6 core_vdd ? power power supply connection for the digital core logic. connect to +1.8v dc digital. f1 cd1 non synchronous input status signal input signal levels are lvcmos/lvttl compatible. used to indicate the presence of a se rial digital input signal. normally generated by a gennum automatic cable equalizer. when low, the serial digital input signal received at the ddi1 and ddi1 pins is cons idered valid. when high, the associated serial digi tal input signal is considered to be invalid. in this case, the locked signal is set low and all parallel outputs are muted. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 11 of 74 f4 20bit/10bit non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to select the output data bus width in smpte or data-through modes. this signal is ignored in dvb-asi mode. when set high, the parallel output will be 20-bit demultiplexed data. when set low, the parallel outputs will be 10-bit multiplexed data. f10, f9, g10, g9, h10, h9, j10, j9, k10, k9 dout[9:0] synchronous with pclk output parallel data bus signal levels are lvcmos/lvttl compatible. dout9 is the msb and dout0 is the lsb. hd 20-bit mode sd/hd = low 20bit/10bit = high chroma data output in smpte mode smpte_bypass =high dvb_asi = low data output in data-through mode smpte_bypass = low dvb_asi = low hd 10-bit mode sd/hd = low 20bit/10bit = low forced low in all modes. sd 20-bit mode sd/hd = high 20bit/10bit = high chroma data output in smpte mode smpte_bypass = high dvb_asi = low data output in data-through mode smpte_bypass = low dvb_asi = low forced low in dvb-asi mode smpte_bypass = low dvb_asi = high sd 10-bit mode sd/hd = high 20bit/10bit = low forced low in all modes. g1, h1 ddi2, ddi2 analog input differential input pair for serial digital input 2. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 12 of 74 g4 ioproc_en/dis non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to enable or disable i/o processing features. when set high, the following i/o proc essing features of the device are enabled: ? edh crc error correction (sd-only) ? anc data checksum correction ? line-based crc error correction (hd-only) ? line number error correction (hd-only) ? trs error correction ? illegal code remapping to enable a subset of these features, keep ioproc_en/dis high and disable the individual feature(s) in the ioproc_disable register accessible via the host interface. when set low, the i/o processing feat ures of the device are disabled, regardless of whether the features are enabled in the ioproc_disable register. g5 smpte_bypass non synchronous input / output control signal input / status signal output signal levels are lvcmos/lvttl compatible. this pin will be an input set by the appl ication layer in slave mode, and will be an output set by the device in master mode. master mode (master/slave = high) the smpte_bypass signal will be high only when the device has locked to a smpte compliant data stream. it will be low otherwise. slave mode (master/slave = low) when set high in conjunction with dvb_asi = low, the device will be configured to operate in smpte mode. all i/o processing features may be enabled in this mode. when set low, the device will not s upport the descrambling, decoding or word alignment of received smpte data. no i/o processing features will be available. g6 reset_trst non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to reset the internal operating conditions to default settings and to reset the jtag test sequence. host mode (jtag/host = low) when asserted low, all functional blocks will be set to default conditions and all input and output signals become high impedance, including the serial digital outputs sdo and sdo. must be set high for normal device operation. note: when in slave mode, reset the device after the sd/ hd input has been initially configured, and after each subsequent sd/hd data rate change. jtag test mode (jtag/host = high) when asserted low, all functional blocks will be set to default and the jtag test sequence will be held in reset. when set high, normal operation of the jtag test sequence resumes. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 13 of 74 g8 fifo_ld synchronous with pclk output control signal output signal levels are lvcmos/lvttl compatible. used as a control signal for external fifo(s). normally high but will go low for one pclk period at sav. h2 term2 analog input termination for serial di gital input 2. ac couple to pdbuff_gnd. h4 cs _tms synchronous with sclk_tck input control signal input signal levels are lvcmos/lvttl compatible. chip select / test mode select host mode (jtag/host = low) cs _tms operates as the host interface chip select, cs , and is active low. jtag test mode (jtag/host = high) cs _tms operates as the jtag test mode select, tms, and is active high. note: if the host interface is not being used, tie this pin high. h5 sclk_tck non synchronous input control signal input signal levels are lvcmos/lvttl compatible. serial data clock / test clock. host mode (jtag/host = low) sclk_tck operates as the host interface burst clock, sclk. command and data read/write words are clocked into the device synchronously with this clock. jtag test mode (jtag/host = high) sclk_tck operates as the jtag test clock, tck. note: if the host interface is not being used, tie this pin high. h6 sdout_tdo synchronous with sclk_tck output control signal output signal levels are lvcmos/lvttl compatible. serial data output / test data output host mode (jtag/host = low) sdout_tdo operates as the host interface serial output, sdout, used to read status and configuration information from the internal registers of the device. jtag test mode (jtag/host = high) sdout_tdo operates as the jtag test data output, tdo. h7 data_error synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. the data_error signal will be low when an error within the received data stream has been detected by the dev ice. this pin is a logical 'or'ing of all detectable errors listed in t he internal error_status register. once an error is detected, data_error will remain low until the start of the next video frame / field, or unt il the error_status register is read via the host interface. the data_error signal will be high when the received data stream has been detected without error. note: it is possible to program which e rror conditions are monitored by the device by setting appropriate bits of the error_mask register high. all error conditions are detected by default. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 14 of 74 h8 h synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. used to indicate the portion of the vi deo line containing active video data. h signal timing is configurable via the h_config bit of the ioproc_disable register accessible via the host interface. active line blanking (h_config = 0 h ) the h signal will be high for the entire horizontal blanking period, including the eav and sav trs words, and low otherwise. this is the default setting. trs based blanking (h_config = 1 h ) the h signal will be high for the entire horizontal blanking period as indicated by the h bit in the received trs id words, and low otherwise. j1 cd2 non synchronous input status signal input signal levels are lvcmos/lvttl compatible. used to indicate the presence of a se rial digital input signal. normally generated by a gennum automatic cable equalizer. when low, the serial digital input signal received at the ddi2 and ddi2 pins is cons idered valid. when high, the associated serial digi tal input signal is considered to be invalid. in this case, the locked signal is set low and all parallel outputs are muted. j5 sdo_en/dis non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to enable or disable the serial digital output loop-through stage. when set low, the serial digi tal output signals sdo and sdo are disabled and become high impedance. when set high, the serial digital output signals sdo and sdo are enabled. j6 sdin_tdi synchronous with sclk_tck input control signal input signal levels are lvcmos/lvttl compatible. serial data in / test data input host mode (jtag/host = low) sdin_tdi operates as the host interf ace serial input, sdin, used to write address and configuration information to the internal registers of the device. jtag test mode (jtag/host = high) sdin_tdi operates as the jtag test data input, tdi. note: if the host interface is not being used, tie this pin high. j7 v synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. used to indicate the portion of the vi deo field / frame that is used for vertical blanking. the v signal will be high for the entire vertical blanking period as indicated by the v bit in the received trs signals. the v signal will be low for all lines outside of the vertical blanking interval. k1 rset analog input used to set the serial digi tal loop-through output signal amplitude. connect to cd_vdd through 281 +/- 1% for 800mv p-p single-ended output swing. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 15 of 74 k2 cd_vdd ? power power supply connection for t he serial digital cable driver. connect to +1.8v dc analog. k3, k4 sdo, sdo analog output serial digital loop-through output signal operating at 1.485gb/s, 1.485/1.001gb/s, or 270mb/s. the slew rate of these outputs is automatically controlled to meet smpte 292m and 259m requirements according to the setting of the sd/hd pin. k5 cd_gnd ? power ground connection for the seri al digital cable driver. connect to analog gnd. k6 jtag/host non synchronous input control signal input signal levels are lvcmos/lvttl compatible. used to select jtag test mode or host interface mode. when set high, cs _tms, sdout_tdo, sdi_tdi and sclk_tck are configured for jtag boundary scan testing. when set low, cs _tms, sdout_tdo, sdi_tdi and sclk_tck are configured as gspi pins for normal host interface operation. k7 f synchronous with pclk output status signal output signal levels are lvcmos/lvttl compatible. used to indicate the odd / even field of the video signal. the f signal will be high for the entire period of field 2 as indicated by the f bit in the received trs signals. the f signal will be low for all line s in field 1 and for all lines in progressive scan systems. table 1-1: pin descriptions (continued) pin number name timing type description
gs1559 data sheet 30572 - 4 july 2005 16 of 74 2. electrical characteristics 2.1 absolute maximum ratings 2.2 dc electrical characteristics parameter value/units supply voltage core -0.3v to +2.1v supply voltage i/o -0.3v to +4.6v input voltage range (any input) -2.0v to + 5.25v ambient operating temperature -20c < t a < 85c storage temperature -40c < t stg < 125c esd protection on all pins (see note 1) 1kv notes: 1. hbm, per jesda-114b. table 2-1: dc electrical characteristics t a = 0c to 70c, unless otherwise specified. parameter symbol conditions min typ max units test level notes system operation temperature range t a ?0?70c31 digital core supply voltage core_vdd ? 1.71 1.8 1.89 v 3 1 digital i/o supply voltage io_vdd ? 3.13 3.3 3.47 v 3 1 charge pump supply voltage cp_vdd ? 3.13 3.3 3.47 v 3 1 phase detector supply voltage pd_vdd ? 1.71 1.8 1.89 v 3 1 input buffer supply voltage buff_vdd ? 1.71 1.8 1.89 v 3 1 cable driver supply voltage cd_vdd ? 1.71 1.8 1.89 v 3 1 external vco supply voltage output vco_vcc ? 2.25 ? 2.75 v 1 ? +1.8v supply current i 1v8 sdo enabled ??245ma3 4 +3.3v supply current i 3v3 ???55ma35
gs1559 data sheet 30572 - 4 july 2005 17 of 74 to ta l d e v i c e p o w e r p d sdo enabled ??550mw3 ? p d sdo disabled ??450mw3 ? digital i/o input logic low v il ??? 0.8v4? input logic high v ih ?2.1??v4? output logic low v ol +8ma ? 0.2 0.4 v 4 ? output logic high v oh -8ma io_vdd - 0.4 ??v 4 ? input input bias voltage v b ? ? 1.45 ? v 1 2 rset voltage v rset rset=281 0.54 0.6 0.66 v 1 3 output output common mode voltage v cmout 75 load, rset=281 , sd and hd 0.8 1.0 1.2 v 1 ? test levels 1. production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges using correlated test. 3. production test at room temperature and nominal supply voltage. 4. qa sample test. 5. calculated result based on level 1, 2, or 3. 6. not tested. guaranteed by design simulations. 7. not tested. based on characterization of nominal parts. 8. not tested. based on existing des ign/characterization data of similar product. 9. indirect test. notes 1. all dc and ac electrical para meters within specification. 2. input common mode is set by internal biasing resistors. 3. set by the value of the rset resistor. 4. sum of all 1.8v supplies. 5. sum of all 3.3v supplies. table 2-1: dc electrical characteristics (continued) t a = 0c to 70c, unless otherwise specified. parameter symbol conditions min typ max units test level notes
gs1559 data sheet 30572 - 4 july 2005 18 of 74 2.3 ac electrical characteristics table 2-2: ac electrical characteristics t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units test level notes system serial digital input jitter tolerance ijt nominal loop bandwidth 0.6 ? ? ui 1 1 master mode asynchronous lock time no data to hd ? ? 468 us 6,7 2 hd to sd ? ? 260 us 6,7 2 hd to dvb-asi ? ? 135 us 6,7 2 no data to sd ? ? 340 us 6,7 2 sd to hd ? ? 256 us 6,7 2 sd to dvb-asi ? ? 173 us 6,7 2 no data to dvb-asi ? ? 65 us 6,7 2 dvb-asi to sd ? ? 227 us 6,7 2 dvb-asi to hd ? ? 215 us 6,7 2 slave mode asynchronous lock time no data to hd ? ? 240 us 6,7 2 no data to sd ? ? 197 us 6,7 2 no data to dvb-asi ? ? 68 us 6,7 2 device latency 10-bit sd ? 21 ? pclk 8 ? 20-bit hd ? 19 ? pclk 8 ? dvb-asi ? 11 ? pclk 8 ? reset pulse width t reset ? 1??ms84 serial digital differential input serial input data rate dr ddi ? ? 1.485 ? gb/s 1 ? ? ? 1.485/1.001 ? gb/s 9 ? ? ? 270 ? mb/s 1 ? serial digital input signal swing v ddi differential with internal 100 input termination 200 600 1000 mv p-p 1? serial digital output serial output data rate dr sdo ? ? 1.485 ? gb/s 1 ? ? ? 1.485/1.001 ? gb/s 9 ? ? ? 270 ? mb/s 1 ? serial output swing v sdo rset = 281 load = 75 650 800 950 mvp-p 1 ? serial output rise time 20% ~ 80% tr sdo hd signal ? ? 260 ps 1 ? sd signal 400 550 1500 ps 1 ? serial output fall time 20% ~ 80% tf sdo hd signal ? ? 260 ps 1 ? sd signal 400 550 1500 ps 1 ?
gs1559 data sheet 30572 - 4 july 2005 19 of 74 serial output intrinsic jitter t ij pseudorandom and pathological hd signal ? 90 125 ps 5 3 pseudorandom and pathological sd signal ? 270 350 ps 5 3 parallel output parallel clock frequency f pclk ? 13.5 ? 148.5 mhz 4 ? parallel clock duty cycle dc pclk ? 405060%4? output data hold time t oh 20-bit hd, 15pf 1.0 ? ? ns 4 ? 10-bit sd, 15pf 19.5 ? ? ns 8 ? output data delay time t od 20-bit hd, 15pf ? ? 4.5 ns 4 ? 10-bit sd, 15pf ? ? 22.8 ns 8 ? output data rise/fall time tr/tf ? ? ? 1.5 ns 3 ? gspi gspi input clock frequency f sclk ???6.6mhz8? gspi input clock duty cycle dc sclk ?40?60%8? gspi input data setup time ?? 0??ns8? gspi input data hold time ? ? 1.43 ? ? ns 8 ? gspi output data hold time ?? 2.1? ?ns8? gspi output data delay time ? ? ? ? 7.27 ns 8 ? test levels 1. production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. production test at room temperature and nominal supply voltage with guardbands for supply and temperatur e ranges using correlated test. 3. production test at room temperature and nominal supply voltage. 4. qa sample test. 5. calculated result based on level 1, 2, or 3. 6. not tested. guaranteed by design simulations. 7. not tested. based on characterization of nominal parts. 8. not tested. based on existing desi gn/characterization data of similar product. 9. indirect test. notes 1. 6mhz sinewave modulation. 2. hd = 1080i, sd = 525i 3. serial digital output reclocked ( rc_byp = high). 4. see device reset on page 68 , figure 4-16 . table 2-2: ac electrical characteristics (continued) t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units test level notes
gs1559 data sheet 30572 - 4 july 2005 20 of 74 2.4 solder reflow profiles the gs1559 is available in a pb or pb-free package. it is recommended that the pb package be soldered with pb paste us ing the standard eutectic profile shown in figure 2-1 , and the pb-free package be soldered with pb-free paste using the reflow profile shown in figure 2-2 . note: it is possible to so lder a pb-free package with pb paste using a standard eutectic profile with a reflow temperature maintained at 245 o c ? 250 o c. figure 2-1: standard eutectic solder re flow profile (pb package, pb paste) figure 2-2: maximum pb-free solder refl ow profile (pb-free package, pb-free paste) 25?c 100?c 150?c 183?c 230?c 220?c time temperature 6 min. max 120 sec. max 60-150 sec. 10-20 sec. 3?c/sec max 6?c/sec max 25?c 150?c 200?c 217?c 260?c 250?c time temperature 8 min. max 60-180 sec. max 60-150 sec. 20-40 sec. 3?c/sec max 6?c/sec max
gs1559 data sheet 30572 - 4 july 2005 21 of 74 3. input/output circuits all resistors in ohms, all capacitors in farads, unless otherwise shown. figure 3-1: serial digital input figure 3-2: vco input figure 3-3: pll loop bandwidth control vdd 50 50 ddi ddi 45k 150k term vdd 25 25 vco vco 1.5k 5k 865mv 7.2k lb_cont
gs1559 data sheet 30572 - 4 july 2005 22 of 74 figure 3-4: serial digital output figure 3-5: vco control output & pll lock time capacitor sdo sdo 300 cp_cap lf
30572 - 4 july 2005 23 of 74 gs1559 data sheet 3.1 host interface map register nameaddress1514131211109876543210 error_mask 01ah not used not used not used not used not used vd_std_ err_ mask ff_crc_ err_ mask ap_crc_ err_ mask lock_ err_ mask ccs_err_m ask ycs_err_m ask ccrc_ err_ mask ycrc_ err_ mask lnum_err_ mask sav_err_ma sk eav_err_ma sk ff_line_end_f1 019h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_start_f1 018h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_end_f0 017h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_start_f0 016h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_end_f1 015h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_start_f1 014h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_end_f0 013h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_start_f0 012h not used not used not used not used not used not used b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 raster_structure4 011h not used not used not used not used not usedb10b9b8b7b6b5b4b3b2b1b0 raster_structure3 010h not used not used not used not used not usedb10b9b8b7b6b5b4b3b2b1b0 raster_structure2 00fh not used not used not used not used b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 raster_structure1 00eh not used not used not used not used b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 video_format_out_b 00dh vfo4-b7 vfo4-b6 vfo4-b5 vfo4-b4 vfo4-b3 vfo4-b2 vfo4-b1 vfo4-b0 vfo3-b7 vfo3-b6 vfo3-b5 vfo3-b4 vfo3-b3 vfo3-b2 vfo3-b1 vfo3-b0 video_format_out_a 00ch vfo2-b7 vfo2-b6 vfo2-b5 vfo2-b4 vfo2-b3 vfo2-b2 vfo2-b1 vfo2-b0 vfo1-b7 vfo1-b6 vfo1-b5 vfo1-b4 vfo1-b3 vfo1-b2 vfo1-b1 vfo1-b0 00bh 00ah anc_type5 009hb15b14b13b12b11b10b9b8b7b6b5b4b3b2b1b0 anc_type4 008hb15b14b13b12b11b10b9b8b7b6b5b4b3b2b1b0 anc_type3 007hb15b14b13b12b11b10b9b8b7b6b5b4b3b2b1b0 anc_type2 006hb15b14b13b12b11b10b9b8b7b6b5b4b3b2b1b0 anc_type1 005hb15b14b13b12b11b10b9b8b7b6b5b4b3b2b1b0 video_standard 004h not used vds-b4 vds-b3 vds-b2 vds-b1 vds-b0 int_prog std_ lock cdf-b3 cdf-b2 cdf-b1 cdf-b0 ydf-b3 ydf-b2 ydf-b1 ydf-b0 edh_flag 003h not used anc-ues anc-ida anc-idh anc-eda anc-edh ff-ues ff-ida ff-idh ff-eda ff-edh ap-ues ap-ida ap-idh ap-eda ap-edh 002h error_status 001h not used not used not used not used not used vd_std_ err ff_crc_ err ap_crc_ err lock_ err ccs_err ycs_err ccrc_ err ycrc_ err lnum_err sav_err eav_err ioproc_disable 000h not used not used not used not used not used not used not used h_config not used not used illegal_re map edh_crc_in s anc_ csum_ins crc_ins lnum_ ins trs_ins
30572 - 4 july 2005 24 of 74 gs1559 data sheet 3.1.1 host interface map (r/w configurable registers) register nameaddress1514131211109876543210 error_mask 01ah vd_std_ err_ mask ff_crc_ err_ mask ap_crc_ err_ mask lock_ err_ mask ccs_err_m ask ycs_err_m ask ccrc_ err_ mask ycrc_ err_ mask lnum_err_ mask sav_err_ma sk eav_err_ma sk ff_line_end_f1 019h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_start_f1 018h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_end_f0 017h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ff_line_start_f0 016h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_end_f1 015h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_start_f1 014h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_end_f0 013h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 ap_line_start_f0 012h b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 011h 010h 00fh 00eh 00dh 00ch 00bh 00ah anc_type5 009h b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 anc_type4 008h b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 anc_type3 007h b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 anc_type2 006h b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 anc_type1 005h b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 004h 003h 002h 001h ioproc_disable 000h h_config illegal_re map edh_crc_in s anc_ csum_ins crc_ins lnum_ ins trs_ins
30572 - 4 july 2005 25 of 74 gs1559 data sheet 3.1.2 host interface map (r ead only registers) register nameaddress1514131211109876543210 01ah 019h 018h 017h 016h 015h 014h 013h 012h raster_structure4 011h b10b9b8b7b6b5b4b3b2b1b0 raster_structure3 010h b10b9b8b7b6b5b4b3b2b1b0 raster_structure2 00fh b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 raster_structure1 00eh b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 video_format_out_b 00dh vfo4-b7 vfo4-b6 vfo4-b5 vfo4-b4 vfo4-b3 vfo4-b2 vfo4-b1 vfo4-b0 vfo3-b7 vfo3-b6 vfo3-b5 vfo3-b4 vfo3-b3 vfo3-b2 vfo3-b1 vfo3-b0 video_format_out_a 00ch vfo2-b7 vfo2-b6 vfo2-b5 vfo2-b4 vfo2-b3 vfo2-b2 vfo2-b1 vfo2-b0 vfo1-b7 vfo1-b6 vfo1-b5 vfo1-b4 vfo1-b3 vfo1-b2 vfo1-b1 vfo1-b0 00bh 00ah 009h 008h 007h 006h 005h video_standard 004h vds-b4 vds-b3 vds-b2 vds-b1 vds-b0 int_prog std_ lock cdf-b3 cdf-b2 cdf-b1 cdf-b0 ydf-b3 ydf-b2 ydf-b1 ydf-b0 edh_flag 003h anc-ues anc-ida anc-idh anc-eda anc-edh ff-ues ff-ida ff-idh ff-eda ff-edh ap-ues ap-ida ap-idh ap-eda ap-edh 002h error_status 001h vd_std_ err ff_crc_ err ap_crc_ err lock_ err ccs_err ycs_err ccrc_ err ycrc_ err lnum_err sav_err eav_err 000h
gs1559 data sheet 30572 - 4 july 2005 26 of 74 4. detailed description 4.1 functional overview the gs1559 is a multi-rate reclocking deseri alizer with an integrated serial digital loop-through output. when used in conjunction with the multi-rate gs1574 adaptive cable equalizer and the exter nal go1525 voltage co ntrolled oscillator, a receive solution at 1.485gb/s, 1.4 85/1.001gb/s or 270mb/s is realized. the device has two basic modes of operation which determine precisely how smpte or dvb-asi compliant input data streams are reclocked and processed. in master mode, (master/slave = high), the gs1559 will automatically detect, reclock, deserialize and process sd smpte 259m-c, hd smpte 292m, or dvb-asi input data. in slave mode, (master/slave = low), the application layer must set external device pins for the correct reception of either smpte or dvb-asi data. slave mode also supports the reclocking and de serializing of data not conforming to smpte or dvb-asi streams. the provided serial loop-through outputs may be selected as either buffered or reclocked versions of the input signal and feature a high impedance mode, output mute on loss of signal and adjustable signal swing. in the digital signal processing core, several data processing functions are implemented including error detection and correction and automatic video standards detection. these features are all enabled by default, but may be individually disabled via internal regist ers accessible through the gspi host interface. finally, the gs1559 contains a jtag interface for boundary scan test implementations. 4.2 serial digital input the gs1559 contains two current mode differential serial digital input buffers, allowing the device to be connected to two smpte 259m-c or 292m compliant input signals. both input buffers have internal 50 termination resistors which are connected to ground via the term1 and term2 pins. the input common mode level is set by internal biasing resistors such that the serial digital input signals must be ac coupled into the device. gennum recommends using a capacitor value of 4.7uf to accommodate pathological signals. the input buffers use a separate power supply of +1.8v dc supplied via the buff_vdd and pdbuff_gnd pins.
gs1559 data sheet 30572 - 4 july 2005 27 of 74 4.2.1 input signal selection a 2x1 input multiplexer is pr ovided to allow the applicatio n layer to select between the two serial digital input streams using a single external pin. when ip_sel is set high, serial digital input 1 (ddi1 / ddi1 ) is selected as the input to the gs1559's reclocker stage. when ip_sel is set low, serial digital input 2 (ddi2 / ddi2 ) is selected. 4.2.2 carrier detect input for each of the differential inputs, an a ssociated carrier detect input signal is included, (cd1 and cd2 ). these signals are generated by gennum's family of automatic cable equalizers. when low, cdx indicates that a valid serial digi tal data stream is being delivered to the gs1559 by the equalizer. when high, the serial digital input to the device should be considered invalid. if no equa lizer precedes the device, the application layer should set cd1 and cd2 accordingly. a 2x1 input multiplexer is also prov ided for these signals. the internal carrier_detect signal is determined by the setting of the ip_sel pin and is used by the lock detect block of the gs1559 to dete rmine the lock status of the device, (see lock detect on page 31 ). 4.2.3 single input configuration if the application requires a single differe ntial input, the ddi pin for the second set of inputs and the associated carrier detect should be tied high. the ddi pin may be left unconnected, and the termination pin should be ac terminated to ground. 4.3 serial digital reclocker the output of the 2x1 serial digital input multiplexer passes to the gs1559's internal reclocker stage. the function of this block is to lock to the input data stream, extract a clean clock, and retime the serial digital data to remove high frequency jitter. the reclocker was designed with a 'hexabang' phase and frequency detector. that is, the pfd used can identify six 'deg rees' of phase / frequency misalignment between the input data stream and the cl ock signal provided by the vco, and correspondingly signal the charge pump to produce six different control voltages. this results in fast and accurate locking of the pll to the data stream. in master mode, the operating center frequency of the reclocker is toggled between 270mb/s and 1.485gb/s by the lock detect block, (see lock detect on page 31 ). in slave mode, however, the center frequency is determined ent irely by the sd/hd input control signal set by the application layer. if lock is achieved, the reclocker provides an internal pll_lock signal to the lock detect block of the device.
gs1559 data sheet 30572 - 4 july 2005 28 of 74 4.3.1 external vco the gs1559 requires the external go1525 vo ltage controlled oscillator as part of the reclocker's phase-locked loop. this external vco implementation was chosen to ensure high quality reclocking. power for the external vco is generated entirely by the gs1559 from an integrated voltage regulator. the internal regulator uses +3.3v dc supplied via the cp_vdd / cp_gnd pins to provide +2.5v dc on the vco_vcc / vco_gnd pins. the control voltage to the vco is out put from the gs1559 on the lf pin and requires 4.7k pull-up and pull-down resistors to ensure correct operation. the go1525 produces a 1.485ghz reference signal for the reclocker, input on the vco pin of the gs1559. both lf and vc o signals should be referenced to the supplied vco_gnd as shown in the recommended application circuit of typical application circuit (part a) on page 69 . 4.3.2 loop bandwidth the loop bandwidth of the integrated re clocker is nominally 1.4mhz, but may be increased or decreased via the lb_cont pin. it is recommended that this pin be connected to vco_gnd through 39.2k to maximize the input jitter tolerance of the device. 4.4 serial digital loop-through output the gs1559 contains an integrated current mode differential serial digital cable driver with automatic slew rate control. when enabled, this serial digital output provides an active loop-through of the input signal. the integrated cable driver uses a separate power supply of +1.8v dc supplied via the cd_vdd and cd_gnd pins. to enable the loop-through output, sdo_en/dis must be set high by the application layer. setting the sdo_en/dis signal low will cause the sdo and sdo output pins to become high impedan ce, resulting in reduced device power consumption. when not using the serial digital out put from the gs1559, the sdo and sdo pins should be left unconnected (floating). in addition, the sdo_en pin should be set low and the rset pin may be ac terminated to analog ground through a 10nf capacitor. gennum recommends using the gs1528a sd i dual slew-rate cable driver to meet smpte specifications.
gs1559 data sheet 30572 - 4 july 2005 29 of 74 4.4.1 output swing nominally, the voltage swing of the serial digital loop-through output is 800mv p-p single-ended into a 75 load. this is set externally by connecting the rset pin to cd_vdd through 281 . the loop-through output swing may be decreased by increasing the value of the rset resistor. the relati onship is approximated by the curve shown in figure 4-1 . alternatively, the serial digital output can drive 800mvp-p into a 50 load. since the output swing is reduced by a factor of approximately one third when the smaller load is used, the rset resistor must be 187 to obtain 800mvp-p. figure 4-1: serial digital l oop-through output swing 4.4.2 reclocker bypass control the serial digital loop-through output may be either a buffered version of the serial digital input signal, or a reclocked version of that signal. when operating in slave mode, the app lication layer may choose the reclocked output by setting rc_byp to logic high. if rc_byp is set low, the data stream will bypass the internal reclocker and the serial digital output will be a buffered version of the input. when operating in master mode , the device will assert the rc_byp pin high only when it has successfully lo cked to a smpte or dvb-asi input data stream, (see lock detect on page 31 ). in this case, the serial di gital loop-throu gh output will be a reclocked version of the input. 300 400 500 600 700 800 900 1000 250 300 350 400 450 500 550 600 650 700 750 rset( ) v sdo (mv p-p )
gs1559 data sheet 30572 - 4 july 2005 30 of 74 4.4.3 serial digital output mute the gs1559 will automati cally mute the serial digital loop-through outp ut in both master and slave modes when the internal carrier_detect signal indicates an invalid serial input. the loop-through output will also be muted in slave mo de when sdo/sdo is selected as reclocked, (rc_byp = high), but the lock detect block has failed to lock to the data stream, (locked = low). table 4-1 summarizes the possible states of the serial digital loop-through output data stream. 4.5 serial-to-parallel conversion the retimed data and phase-locked clock signals from the reclocker are fed to the serial-to-parallel converter. the function of this block is to extract 10-bit or 20-bit parallel data words from the reclocked serial data stream and present them to the smpte and dvb-asi word alignment blocks simultaneously. table 4-1: serial digital l oop-through output status slave mode sdo cd locked rc_byp (input) reclocked low high high buffered low x low muted low low high muted high low* x master mode sdo cd locked rc_byp (output) reclocked low high high buffered low low low muted high low* low *note: locked = high if and only if cd = low
gs1559 data sheet 30572 - 4 july 2005 31 of 74 4.6 modes of operation the gs1559 has two basic modes of operation which determine how the lock detect block controls the integrated recl ocker. master mode is enabled when the application layer sets the master/slave pin high, and slave mode is enabled when master/slave is set low. 4.6.1 lock detect the lock detect block controls the center frequency of the integrated reclocker to ensure lock to the received serial digital data stream is achieved, and indicates via the locked output pin that the device has detected the appropriate sync words. in data through mode the detection for appropriate sync words is turned off. the locked pin is an indication of analog lock. lock detection is a continuous process, which begins at device power up or after a system reset, and continues until the device is powered down or held in reset. the lock detection algorithm first determines if a valid serial digital input signal has been presented to the device by sampling the internal carrier_detect signal. as described in carrier detect input on page 27 , this signal will be low when a good serial digital input signal has been detected. if the carrier_detect signal is high, the se rial data into the de vice is considered invalid, and the vco frequency will be set to the center of the pull range. the locked pin will be low and a ll outputs of the device ex cept for the pclk output will be muted. instead, the pclk output freq uency will operate wit hin +/-3% of the rates shown in table 4-16 of parallel output clock (pclk) on page 63 . note: when the device is operating in dvb-asi slave mode only, the parallel outputs will not mute when the carrier_de tect signal is high. the locked signal will function normally. if a valid input signal has been detected, and the device is in master mode, the lock algorithm will enter a hunt phase where f our attempts are m ade to detect the presence of either smpte trs sync wo rds or dvb-asi sync words. at each attempt, the center frequency of the reclocker will be toggled between 270mb/s and 1.485gb/s. assuming that a valid smpt e or dvb-asi signal has been applied to the device, asynchronous lock times will be as listed in table 2-2 . in slave mode, the application layer fixes t he center frequency of the reclocker such that the lock algorithm will attempt to lock within the single data rate determined by the setting of the sd/hd pin. asynchronous lock times are also listed in the table 2-2 . note: the pclk output will continue to o perate during the lock detection process. the frequency may toggle between 148mhz and 27mhz when the 20bit/10bit pin is set low, or between 74mhz and 13.5mhz when 20bit/10bit is set high.
gs1559 data sheet 30572 - 4 july 2005 32 of 74 for smpte and dvb-asi inputs, the lock detect block will only assert the locked output signal high if (1) the reclocker has locked to the input data stream as indicated by the internal pll_lock signal, and (2) trs or dvb-asi sync words have been correctly identified. if after four attemp ts lock has not been achieved, the lock detection algorithm will enter into pll lock mode. in this mode, the reclocker will attempt to lock to the input data stream without detecting smpte trs or dvb-asi sync words. this unassisted process can take up to 10ms to achieve lock. when reclocker lock as indicated by the inte rnal pll_lock signal is achieved in this mode, one of the following will occur: 1. in slave mode, data will be passed direct ly to the parallel outputs without any further processing taking place and th e locked signal will be asserted high if and only if the smpte_bypass and dvb_asi input pins are set low; or 2. in master mode, the locked signal will be asserted low, the parallel outputs will be latched to lo gic low, and the smpte_bypass and dvb_asi output signals will also be set low. 4.6.2 master mode recall that the gs1559 is said to be in master mode when the master/slave input signal is set high. in this case, the following four devic e pins become output status signals: ? smpte_bypass ? dvb_asi ? sd/hd ? rc_byp the combined setting of these four pins will indicate whether the device has locked to valid smpte or dvb-asi data at sd or hd rates. table 4-2 shows the possible combinations. 4.6.3 slave mode the gs1559 is said to be in slave mode when the master/slave input signal is set low. in this case, the four device pins listed in master mode on page 32 become input control signals. it is required that the app lication layer set the first three inputs to reflect the appropriate input data format (smpte_bypass , dvb_asi, and sd/hd ). if just one of these three is configured incorrectly, the device will not lock to the input data stream, and the data_error pin will be set low. the fourth input signal, rc_byp , allows the application layer to determine whether the serial digital loop-throu gh output will be a reclocked or buffered ve rsion of the input, (see reclocker bypass control on page 29 ). table 4-3 shows the required settings for various input formats.
gs1559 data sheet 30572 - 4 july 2005 33 of 74 table 4-2: master mode output status signals format pin settings smpte_bypass dvb_asi sd/hd rc_byp hd smpte high low low high sd smpte high low high high dvb-asi low high high high not smpte or dvb-asi* low low high or low low *note: when the device locks to the data stream in pll lock mode, the parallel outputs will be latched low, and the serial loop-through output will be a buffered version of the input. table 4-3: slave mode input control signals format pin settings smpte_bypass dvb_asi sd/hd hd smpte high low low sd smpte high low high dvb-asi low high high not smpte or dvb-asi* low low high or low *note: see data through mode on page 42 for a complete description of data through mode.
gs1559 data sheet 30572 - 4 july 2005 34 of 74 4.7 smpte functionality the gs1559 is said to be in smpte mode once the device has detected smpte trs sync words and locked to the input data stream as described in lock detect on page 31 . the device will remain in smpte mo de until such time that smpte trs sync words fail to be detected. the lock detect block may also drop out of smpte mode under the following conditions: ? reset_trst is asserted low ? cdx is high ? smpte_bypass is asserted low in slave mode ? dvb_asi is asserted high in slave mode trs word detection is a continuous process and both 8-bit and 10-bit trs words will be identified by the device in both sd and hd modes. in master mode, the gs 1559 sets the smpte_bypass pin high and the dvb_asi pin low to indicate that it ha s locked to a smpte input data stream. when operating in slave mode, the applicat ion layer must assert the dvb_asi pin low and the smpte_bypass pin high in order to enable smpte operation. 4.7.1 smpte descrambling and word alignment after serial-to-parallel conversion, the internal 10-bit or 20-bit data bus is fed to the smpte descramble and word alignment block. the function of this block is to carry out nrzi-to-nrz decoding, descrambling according to smpte 259m or 292m, and word alignment of the data to the trs sync words. word alignment occurs when two consecutive valid trs words (sav and eav inclusive) with the same bit alignment have been detected. in normal operation, re-syn chronization of the word alignment process will only take place when two consecutive iden tical trs word positions have been detected. when automatic or manual switch line lock handling is 'actioned', (see switch line lock handling on page 35 ), word alignment re-synchronization will occur on the next received trs code word. 4.7.2 internal flywheel the gs1559 has an internal flywheel which is used in the generation of internal / external timing signals, in the detection and correction of certain error conditions and in automatic video standar ds detection. it is only operational in smpte mode. the flywheel consists of a number of coun ters and comparators operating at video pixel and video line rates. these counters maintain information about the total line length, active line length, total number of lines per field / frame, and total active lines per field / frame for the received video stream.
gs1559 data sheet 30572 - 4 july 2005 35 of 74 the flywheel 'learns' the video standard by timing the horizontal and vertical reference information contained in the trs id words of the received video stream. full synchronization of the flywheel to the received video standard therefore requires one complete video frame. once synchronization has be en achieved, the fl ywheel will continue to monitor the received trs timing information to maintain synchronization. the fw_en/dis input pin controls the synchronization mechanism of the flywheel. when this input signal is low, the flywheel will re-synchronize all pixel and line based counters on every received trs id word. when fw_en/dis is held high, re-synchronization of the pixel and line based counters will only take place when a cons istent synchronizati on error has been detected. two consecutive video lines with identical trs timing different to the current flywheel timing must occur to init iate re-synchronization of the counters. this provides a measure of noise immunity to internal and external timing signal generation. the flywheel will be disabled should the locked signal or the reset_trst signal be low. a low to high transition on either signal will cause the flywheel to re-acquire synchronization on the ne xt received trs word, regardless of the setting of the fw_en/dis pin. 4.7.3 switch line lock handling the principal of switch line lock handling is that the switching of synchronous video sources will only disturb the horizontal timi ng and alignment of the stream, whereas the vertical timing rema ins in synchronization. to account for the horizontal disturbanc e caused by a synchronous switch, it is necessary to re-synchronize the flywheel immediately after the switch has taken place. rapid re-synchronization of the gs1559 to the new video standard can be achieved by controlling the flywheel using the fw_en/dis pin. at every pclk cycle the device samples the fw_en/dis pin. when a logic low to high transition at this pin is detect ed anywhere within the active line, the flywheel will re-synchronize immediately to the next trs word. this is shown in figure 4-2 . to ensure switch line lock handling, the fw_en/dis signal should be low for a minimum of one pclk cycle (maximum o ne video line) anywhere within the active portion of the line on which the switch has taken place.
gs1559 data sheet 30572 - 4 july 2005 36 of 74 figure 4-2: switch line locking the ability to manua lly re-synchronize the flywh eel is also important when switching asynchronous sources or to implement other non-standardized video switching functions. the gs1559 also implements automatic swit ch line lock handling. by utilizing the synchronous switch points defined by sm pte rp168 for all major video standards with the automatic video standards detect function, the device automatically re-synchronizes the flywhee l at the switch point. this function will occur regardless of th e setting of the fw_en/dis pin. the switch line is defined as follows: ? for 525 line interlaced systems: re-sync takes place at the end of lines 10 & 273. ? for 525 line progressive systems: re-sync takes place at the end of line 10. ? for 625 line interlaced systems: re-sync takes place at the end of lines 6 & 319. ? for 625 line progressive systems: re-sync takes place at the end of line 6. eav anc active picture eav anc sav eav anc active picture sav eav anc active picture sav eav anc sav video source 1 eav anc active picture eav anc sav eav anc active picture sav eav anc sav active picture eav anc sav video source 2 eav anc active picture sav eav anc sav data in active picture eav anc sav anc active picture eav anc sav switch point flywheel trs position eav anc active picture sav eav anc sav anc active picture data out active picture eav anc sav eav anc sav fw_en/dis switch video source 1 to 2 flywheel re-synch eav anc active picture eav anc sav eav anc active picture sav eav anc active picture sav eav anc sav video source 1 eav anc active picture eav anc sav eav anc active picture sav eav anc sav active picture eav anc sav video source 2 eav anc active picture sav eav anc sav data in active picture eav anc sav active picture eav anc sav switch point flywheel trs position eav anc active picture sav eav anc sav active picture data out switch video source 2 to 1 eav anc sav active picture eav anc sav flywheel re-synch fw_en/dis
gs1559 data sheet 30572 - 4 july 2005 37 of 74 ? for 750 line progressive systems: re-sync takes place at the end of line 7. ? for 1125 line interlaced systems: re-sync takes place at the end of lines 7 & 568. ? for 1125 line progressive systems: re-sync takes place at the end of line 7. a full list of all major video standar ds and switching lines is shown in table 4-4 . note 1: the flywheel timing will define th e line count such t hat the line numbers shown in table 4-4 may not correspond directly to the digital line counts. note 2: unless indicated by smpte 352m payload identifier packets, the gs1559 will not distinguish between 50/60 frames psf and 25/30 frames interlaced for the 1125 line video systems; 24 psf will be identified. table 4-4: switch line posi tion for digital systems system video format sampling signal standard parallel interface serial interface switch line no. hd-sdti 1920x1080 (psf) 4:2:2 274m 274m + 348m 292m 7 1920x1080 (2:1) 4:2:2 274m 274m + 348m 292m 7, 569 1280x720 (1:1) 4:2:2 296m 296m + 348m 292m 7 sdti 720x576/50 (2:1) 4:2:2 bt.656 bt.656 + 305m 259m 6, 319 720x483/59.94 (2:1) 4:2:2 125m 125m + 305m 259m 10, 273 750 1280x720/60 (1:1) 4:2:2 296m 296m 296m 7 1280x720/50 (1:1) 4:2:2 296m 296m 296m 7 1280x720/30 (1:1) 4:2:2 296m 296m 296m 7 1280x720/25 (1:1) 4:2:2 296m 296m 296m 7 1280x720/24 (1:1) 4:2:2 296m 296m 296m 7 1125 1920x1080/60 (1:1) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/50 (1:1) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/30 (1:1) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/25 (1:1) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/24 (1:1) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/30 (psf) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/25 (psf) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/24 (psf) 4:2:2 274m + rp211 274m + rp211 292m 7 1920x1080/60 (2:1) 4:2:2 274m + rp211 274m + rp211 292m 7, 569 1920x1080/50 (2:1) 4:2:2 274m + rp211 274m + rp211 292m 7, 569
gs1559 data sheet 30572 - 4 july 2005 38 of 74 525 960x483/59.94 (2:1) 4:2:2 267m 349m 292m 10, 273 960x483/59.94 (2:1) 4:2:2 267m 267m 259m 10, 273 720x483/59.94 (2:1) 4:4:4:4 267m 349m 292m 10, 273 720x483/59.94 (2:1) 4:4:4:4 267m 347m 344m 10, 273 720x483/59.94 (2:1) 4:4:4:4 267m rp174 344m 10, 273 720x483/59.94 (2:1) 4:4:4:4 267m rp175 rp175 10, 273 720x483/59.94 (2:1) 4:2:2 125m 349m 292m 10, 273 720x483/59.94 (2:1) 4:2:2 125m 125m 259m 10, 273 720x483/59.94 (1:1) 4:2:2 293m 349m 292m 10 720x483/59.94 (1:1) 4:2:2 293m 347m 344m 10 720x483/59.94 (1:1) 4:2:2 293m 293m 294m 10 720x483/59.94 (1:1) 4:2:0 293m 349m 292m 10 720x483/59.94 (1:1) 4:2:0 293m 293m 294m 10 625 720x576/50 (1:1) 4:2:2 bt.1358 349m 292m 6 720x576/50 (1:1) 4:2:2 bt.1358 347m 344m 6 720x576/50 (1:1) 4:2:2 bt.1358 bt.1358 bt.1362 6 720x576/50 (1:1) 4:2:0 bt.1358 349m 292m 6 720x576/50 (1:1) 4:2:0 bt.1358 bt.1358 bt.1362 6 960x576/50 (2:1) 4:2:2 bt.601 349m 292m 6, 319 960x576/50 (2:1) 4:2:2 bt.601 bt.656 259m 6, 319 720x576/50 (2:1) 4:4:4:4 bt.799 349m 292m 6, 319 720x576/50 (2:1) 4:4:4:4 bt.799 347m 344m 6, 319 720x576/50 (2:1) 4:4:4:4 bt.799 bt.799 344m 6, 319 720x576/50 (2:1) 4:4:4:4 bt.799 bt.799 ? 6, 319 720x576/50 (2:1) 4:2:2 bt.601 349m 292m 6, 319 720x576/50 (2:1) 4:2:2 bt.601 125m 259m 6, 319 table 4-4: switch line position for digital systems (continued) system video format sampling signal standard parallel interface serial interface switch line no.
gs1559 data sheet 30572 - 4 july 2005 39 of 74 4.7.4 hvf timing signal generation the gs1559 extracts critical timing pa rameters from either the received trs signals (fw_en/dis = low), or from the inter nal flywheel-timing generator (fw_en/dis = high). horizontal blanking period (h), vertical blan king period (v), and even / odd field (f) timing are all extracted and presented to the application layer via the h:v:f status output pins. the h signal timing is configurable via the h_config bit of the internal ioproc_disable register as either ac tive line based blanking, or trs based blanking, (see error correction and insertion on page 57 ). active line based blanking is enabled when the h_config bit is set low. in this mode, the h output is high for the entire horizontal blanking period, including the eav and sav trs words. this is the defa ult h timing used by the device. when h_config is se t high, trs based blanking is enabled. in this case, the h output will be high for the entire horizontal blanking period as indicated by the h bit in the received trs id words. the timing of these signals is shown in figure 4-3 .
gs1559 data sheet 30572 - 4 july 2005 40 of 74 figure 4-3: h, v, f timing h:v:f timing - hd 20-bit output mode pclk luma data out chroma data out h xyz (eav) 000 000 3ff xyz (eav) 000 000 3ff v f xyz (sav) 000 000 3ff xyz (sav) 000 000 3ff h;v:f timing at sav - hd 10-bit output mode 000 000 3ff 3ff xyz (sav) 000 000 xyz (sav) pclk h v f h:v:f timing at eav - hd 10-bit output mode pclk 000 000 3ff 3ff xyz (eav) 000 000 xyz (eav) multiplexed y/cr/cb data out h v f multiplexed y/cr/cb data out h:v:f timing - sd 20-bit output mode pclk chroma data out luma data out h 000 3ff xyz (eav) 000 v f 000 3ff xyz (sav) 000 h:v:f timing - sd 10-bit output mode multiplexed y/cr/cb data out pclk h v f xyz (eav) 000 000 3ff xyz (sav) 000 000 3ff h signal timing: h_config = low h_config = high
gs1559 data sheet 30572 - 4 july 2005 41 of 74 4.8 dvb-asi functionality the gs1559 is said to be in dvb-asi mode once the device has detected 32 consecutive dvb-asi words without a single word or disparity error being generated. the device will remain in d vb-asi mode until 32 consecutive dvb-asi word or disparity errors are detected, or until smpte trs id words have been detected. the lock detect block may also drop out of dvb-asi mode under the following conditions: ? reset_trst is asserted low ? cdx is high ? smpte_bypass is asserted high in slave mode ? dvb_asi is asserted low in slave mode k28.5 sync patterns in the received dvb-asi data stream will be detected by the device in either inverted or non-inverted form. in master mode, the gs 1559 sets the smpte_bypass pin low and the dvb_asi pin high to indicate that it has locked to a dvb-asi input data stream. when operating in slave mode, the ap plication layer must set the sd/hd pin high, in addition to setting smpte_bypass low and dvb_asi high, in order to enable dvb-asi operation. 4.8.1 dvb-asi 8b/10b deco ding and word alignment after serial-to-parallel conversion, the internal 10-bit data bus is fed to the dvb-asi 8b/10b decode and word alignment block. the function of this block is to word align the data to the k28.5 sync characters, and 8b/10b decode and bit-swap the data to achieve bit alignment with the data outputs. the extracted 8-bit data will be presented to dout[17:10 ], bypassing all internal smpte mode data processing. note: when operating in dvb-asi mode, dout[9:0] are forced low. 4.8.2 status signal outputs in dvb-asi mode, the dout 19 and dout18 pins will be configured as dvb-asi status signals syncout an d worderr respectively. syncout will be high whenever a k28.5 sy nc character is pr esent on the output. this output may be used to drive the write enable signal of an external fifo, thus providing a means of removing the k28.5 sync characters from the data stream. parallel dvb-asi data may then be clocked out of the fifo at some rate less than 27mhz. see figure 4-4 . worderr will be high whenever the device has detected a running disparity error or illegal code word.
gs1559 data sheet 30572 - 4 july 2005 42 of 74 figure 4-4: dvb-asi fifo implementation using the gs1559 4.9 data through mode the gs1559 may be configured by the application layer to operate as a simple serial-to-parallel converter. in this mode , the device presents data to the output data bus without performing any decod ing, descrambling or word-alignment. data through mode is enabled only when the master/slave , smpte_bypass , and dvb_asi input pins are set low. under these conditions, the lock detection algorithm enters pll lock mode, (see lock detect on page 31 ), such that the device may reclock data not conforming to smpte or dvb-asi streams. the locked pin will indicate analog lock. when operating in master mode , the gs1559 will set the smpte_bypass and dvb_asi signals to logic low if presented with a data stream without smpte trs id words or dvb-asi sync words. the locked and data bus outputs will be forced low and the serial digital loop-t hrough output will be a bu ffered version of the input. 4.10 additional processing functions the gs1559 contains an additional data processing block which is available in smpte mode only, (see smpte functionality on page 34 ). 4.10.1 fifo load pulse to aid in the application-specific im plementation of auto-phasing and line synchronization functions, the gs1559 will generate a fifo lo ad pulse to reset line-based fifo storage. the fifo_ld output pin will normally be high but will go low for one pclk period, thereby generating a fifo write reset signal. the fifo load pulse will be ge nerated such that it is co -timed to the sav xyz code word presented to th e output data bus. this ensure s that the next pclk cycle will correspond to the first active sample of the video line. figure 4-5 shows the timing relationship between the fifo_ld signal and the output video data. 8 8 aout ~ hout worderr pclk = 27mhz syncout ddi clk_in clk_out fifo ddi read_clk <27mhz fe ff ts we worderr gs1559
gs1559 data sheet 30572 - 4 july 2005 43 of 74 figure 4-5: fifo_ld pulse timing 4.10.2 ancillary data detection and indication the gs1559 will detect all type s of ancillary data in either the vertical or horizontal blanking spaces and indicate via the stat us signal output pins yanc and canc the position of ancillary data in the output da ta stream. these status signal outputs are synchronous with pclk and can be used as clock enables to external logic, or as write enables to an external fifo or other memory device. when operating in hd mode, (sd/hd = low), the yanc signal will be high whenever ancillary data is detected in th e luma data stream, and the canc signal will be high whenever ancillary data is detected in the chro ma data stream. pclk luma data out chroma data out fifo_ld 3ff 3ff 3ff 3ff 000 000 000 000 xyz (sav) 000 000 000 000 xyz (sav) xyz (sav) xyz (sav) multiplexed y/cr/cb data out pclk fifo_ld fifo load pulse - hd 10bit output mode fifo load pulse - hd 20bit output mode 3ff 3ff 000 000 000 000 xyz (sav) multiplexed y/cr/cb data out pclk pclk luma data out chroma data out fifo_ld fifo_ld xyz (sav) fifo load pulse - sd 10bit output mode fifo load pulse - sd 20bit output mode
gs1559 data sheet 30572 - 4 july 2005 44 of 74 in sd mode, (sd/hd = high), the yanc and canc signal operation will depend on the output data format. for 20-bit demultiplexed data, (see parallel data outputs on page 61 ), the yanc and canc signals will operate independently. however, for 10-bit multip lexed data, the yanc and canc signals will both be high whenever ancillary data is detected. the signals will be high from the start of the ancillary data preamble and will remain high until after th e ancillary data checksum. the operation of the yanc and canc signals is shown in figure 4-6 . figure 4-6: yanc and canc output signal timing anc data detection - hd 20bit output mode anc data detection - hd 10bit output mode 000 000 000 000 3ff 3ff 3ff 3ff 3ff 3ff 3ff 3ff did ydid did dbn dbn anc data anc data anc data anc data dc dc blank blank csum csum canc ycsum ccsum yanc canc pclk luma data out chroma data out multiplexed y/cr/cb data out yanc canc pclk blank did dbn anc data anc data anc data anc data anc data anc data anc data anc data blank csum csum 3ff 000 000 did 3ff dbn dc 3ff 3ff dc anc data anc data detection - sd 20bit output mode anc data detection - sd 10bit output mode pclk multiplexed y/cr/cb data out yanc/canc pclk luma data out chroma data out yanc canc
gs1559 data sheet 30572 - 4 july 2005 45 of 74 4.10.2.1 programmable ancillary data detection although the gs1559 will detect all types of an cillary data by default, it also allows the host interface to specific ally program up to five diff erent ancillary data types for detection. this is accomplished via the anc_type register ( table 4-5 ). for each data type to be detected, the host interface must program the did and/or sdid of the ancillary data type of inte rest. the gs1559 will compare the received did and/or sdid with the programmed val ues and assert yanc and canc only if an exact match is found. if any did or sdid value is set to zero in the anc_type register, no comparison or match will be made for th at value. for example, if the did is programmed but the sdid is set to zero, the device will de tect all ancillary data types matching the did value, regardless of the sdid. in the case where all five did and sdid values are set to zero, the gs1559 will detect all ancillary data types. this is the default setting after device reset. where one or more, but less than five, did and/or sdid values have been programmed, then on ly those matching ancillary da ta types will be detected and indicated. note 1: the gs1559 will always detect edh ancillary data pa ckets for edh error detection purposes, regardless of which did/sdid values have been programmed for ancillary data indication, (see edh crc error detection on page 53 ). note 2: see smpte 291m for a defi nition of ancillary data terms. table 4-5: host interface description for pr ogrammable ancillary data type registers register name bit name description r/w default anc_type1 address: 005h 15-8 anc_type1[15:8] used to program the did for ancillary data detection at the yanc and canc output r/w 0 7-0 anc_type1[7:0] used to program the sdid for ancillary data detection at the yanc and canc output. should be set to zero if no sdid is present in the ancillary data packet to be detected. r/w 0 anc_type2 address: 006h 15-8 anc_type2[15:8] used to program the did for ancillary data detection at the yanc and canc output r/w 0 7-0 anc_type2[7:0] used to program the sdid for ancillary data detection at the yanc and canc output. should be set to zero if no sdid is present in the ancillary data packet to be detected. r/w 0 anc_type3 address: 007h 15-8 anc_type3[15:8] used to program the did for ancillary data detection at the yanc and canc output r/w 0 7-0 anc_type3[7:0] used to program the sdid for ancillary data detection at the yanc and canc output. should be set to zero if no sdid is present in the ancillary data packet to be detected. r/w 0
gs1559 data sheet 30572 - 4 july 2005 46 of 74 4.10.3 smpte 352m payload identifier the gs1559 can receive and detect the presence of the smpte 352m payload identifier ancillary data pa cket. this four word payload identifier packet may be used to indicate the transport mechanism, frame rate and line scanning / sampling structure. upon reception of this packet, the device will extract the four words describing the video format being transported and make this information available to the host interface via the four video_format_out registers ( table 4-6 ). the video_format_out registers will only be updated if the received checksum is the same as the locally calculated checksum. these registers will be cl eared to zero, indicating an und efined format, if the device loses lock to the input data stream (l ocked = low), or if the smpte_bypass pin is asserted low. this is also the default setting after device reset. the smpte 352m packet should be received once per field for interlaced systems and once per frame for progressive systems. if the packet is not received for two complete video frames, the video_fo rmat_out registers will be cleared to zero. anc_type4 address: 008h 15-8 anc_type4[15:8] used to program the did for ancillary data detection at the yanc and canc output r/w 0 7-0 anc_type4[7:0] used to program the sdid for ancillary data detection at the yanc and canc output. should be set to zero if no sdid is present in the ancillary data packet to be detected. r/w 0 anc_type5 address: 009h 15-8 anc_type5[15:8] used to program the did for ancillary data detection at the yanc and canc output r/w 0 7-0 anc_type5[7:0] used to program the sdid for ancillary data detection at the yanc and canc output. should be set to zero if no sdid is present in the ancillary data packet to be detected. r/w 0 table 4-5: host interface description for programm able ancillary data type registers (continued) register name bit name description r/w default
gs1559 data sheet 30572 - 4 july 2005 47 of 74 4.10.4 automatic video standard and data format detection the gs1559 can independently detect the input video standard and data format by using the timing parameters extracted fr om the received trs id words. this information is presented to the host in terface via the video_standard register ( table 4-7 ). total samples per line, active samples per line, total lines per field/frame and active lines per field/frame are also calculated an d presented to the host interface via the raster_structure registers ( table 4-8 ). these line and sample count registers are updated once per frame at the end of line 12. this is in addition to the information contained in th e video_standard register. after device reset, the four raster_s tructure registers default to zero. 4.10.4.1 video standard indication the video standard codes reported in the vd_std[4:0] bits of the video_standard register represent the smpte standards as shown in table 4-9 . in addition to the 5-bit video standard code word, the video_standard register also contains two status bits. the std_ lock bit will be set high whenever the flywheel has achieved full synchronization. the int_prog bit will be set low if the detected video standard is progress ive and high if the detected video standard is interlaced. the vd_std[4:0], std_lock and int_prog bits of the video_standard register will default to zero after devi ce reset. the vd_std[4:0] and int_prog bits will also default to zero if the de vice loses lock to th e input data stream, (locked = low), or if the smpte_bypass pin is asserted low. the std_lock bit will retain its previous value if the input is removed. table 4-6: host interface description for smpte 352m payload identifier registers register name bit name description r/w default video_format_out_b address: 00dh 15-8 smpte352m byte 4 data will be available in this register when video payload identification packets are detected in the data stream. r0 7-0 smpte352m byte 3 data will be available in this register when video payload identification packets are detected in the data stream. r0 video_format_out_a address: 00ch 15-8 smpte352m byte 2 data will be available in this register when video payload identification packets are detected in the data stream. r0 7-0 smpte352m byte 1 data will be available in this register when video payload identification packets are detected in the data stream. r0
gs1559 data sheet 30572 - 4 july 2005 48 of 74 table 4-7: host interface description for video standard and data format register register name bit name description r/w default video_standard address: 004h 15 ? not used. 14-10 vd_std[4:0] video data standard (see table 4-9 ). r 0 9 int_prog interlace/progressive: set low if detected video standard is progressive and is set high if it is interlaced. r0 8 std_lock standard lock: set high when flywheel has achieved full synchronization. r0 7-4 cdata_format[3:0] chroma data format. set high in sd mode. indicates chroma data format in hd mode (see table 4-10 ). rf h 3-0 ydata_format[3:0] luma data format. indicates luma data format in hd mode and data format in sd mode (see table 4-10 ). rf h table 4-8: host interface descriptio n for raster structure registers register name bit name description r/w default raster_structure1 address: 00eh 15-12 ? not used. ? ? 11-0 raster_structure1[11:0] words per active line. r 0 raster_structure2 address: 00fh 15-12 ? not used. ? ? 11-0 raster_structure2[11:0] words per total line. r 0 raster_structure3 address: 010h 15-11 ? not used. ? ? 10-0 raster_structure3[10:0] total lines per frame. r 0 raster_structure4 address: 011h 15-11 ? not used. ? ? 10-0 raster_structure4[10:0] active lines per field. r 0 table 4-9: supported video standards vd_std[4:0] smpte standard video format length of hanc length of active video total samples smpte352m lines 00h 296m (hd) 1280x720/60 (1:1) 358 1280 1650 13 01h 296m (hd) 1280x720/60 (1:1) - em 198 1440 1650 13 02h 296m (hd) 1280x720/30 (1:1) 2008 1280 3300 13 03h 296m (hd) 1280x720/30 (1:1) - em 408 2880 3300 13 04h 296m (hd) 1280x720/50 (1:1) 688 1280 1980 13 05h 296m (hd) 1280x720/50 (1:1) - em 240 1728 1980 13 06h 296m (hd) 1280x720/25 (1:1) 2668 1280 3960 13
gs1559 data sheet 30572 - 4 july 2005 49 of 74 07h 296m (hd) 1280x720/25 (1:1) - em 492 3456 3960 13 08h 296m (hd) 1280x720/24 (1:1) 2833 1280 4125 13 09h 296m (hd) 1280x720/24 (1:1) - em 513 3600 4125 13 0ah 274m (hd) 1920x1080/60 (2:1) or 1920x1080/30 (psf) 268 1920 2200 10, 572 0bh 274m (hd) 1920x1080/30 (1:1) 268 1920 2200 18 0ch 274m (hd) 1920x1080/50 (2:1) or 1920x1080/25 (psf) 708 1920 2640 10, 572 0dh 274m (hd) 1920x1080/25 (1:1) 708 1920 2640 18 0eh 274m (hd) 1920x1080/25 (1:1) - em 324 2304 2640 18 0fh 274m (hd) 1920x1080/25 (psf) - em 324 2304 2640 10, 572 10h 274m (hd) 1920x1080/24 (1:1) 818 1920 2750 18 11h 274m (hd) 1920x1080/24 (psf) 818 1920 2750 10, 572 12h 274m (hd) 1920x1080/24 (1:1) - em 338 2400 2750 18 13h 274m (hd) 1920x1080/24 (psf) - em 338 2400 2750 10, 572 14h 295m (hd) 1920x1080/50 (2:1) 444 1920 2376 10, 572 15h 260m (hd) 1920x1035/60 (2:1) 268 1920 2200 10, 572 16h 125m (sd) 1440x487/60 (2:1) (or dual link progressive) 268 1440 1716 13, 276 17h 125m (sd) 1440x507/60 (2:1) 268 1440 1716 13, 276 19h 125m (sd) 525-line 487 generic ? ? 1716 13, 276 1bh 125m (sd) 525-line 507 generic ? ? 1716 13, 276 18h itu-r bt.656 (sd) 1440x576/50 (2:1) (or dual link progressive) 280 1440 1728 9, 322 1ah itu-r bt.656 (sd) 625-line generic (em) ? ? 1728 9, 322 1dh unknown hd ? ? ? ? ? 1eh unknown sd ? ? ? ? ? 1ch, 1fh reserved ? ? ? ? ? table 4-9: supported video standards (continued) vd_std[4:0] smpte standard video format length of hanc length of active video total samples smpte352m lines
gs1559 data sheet 30572 - 4 july 2005 50 of 74 4.10.4.2 data format indication the luma and chroma data format codes will be reported in the ydata_format[3:0] and cdata_format[3:0] bits of the video_standard register when the devi ce is operating in hd mode, (sd/hd = low). in sd or dvb-asi mode, the data fo rmat code will only appear in the ydata_format[3:0] bits. the cdata_for mat[3:0] bits will be set to 'f h '. these codes represent the data formats listed in table 4-10 . the ydata_format[3:0 ] and cdata_format[3:0] bits of the video_standard regist er will default to 'f h ' after device reset. these bits will also default to 'f h ' if the device loses lock to the input da ta stream, (locked = low), or if data-through mode is enabled, (see data through mode on page 42 ). table 4-10: data format codes ydata_format[3:0] or cdata_format[3:0] data format applicable standards 0h sdti dvcpro - no ecc smpte 321m 1h sdti dvcpro - ecc smpte 321m 2h sdti dvcam smpte 322m 3h sdti cp smpte 326m 4h other sdti fixed block size ? 5h other sdti variable block size ? 6h sdi ? 7h dvb-asi ? 8h tdm data smpte 346m 9h ~ eh reserved ? fh unknown data format ?
gs1559 data sheet 30572 - 4 july 2005 51 of 74 4.10.5 error detection and indication the gs1559 contains a number of error detection functions to enhance operation of the device when operating in smpte m ode. these functions, (except lock error detection), will not be avail able in either dvb-asi or data-through operating modes. see dvb-asi functionality on page 41 and data through mode on page 42 . the device maintains an error status register at address 001 h called error_status ( table 4-11 ). each type of error has a specific flag or bit in this register which is set high wh enever that error is detected. the error_status register will be cleared at the start of each video field or when read by the host interface, which ever condition occurs first. all bits of the error_status register except the lock_err bit will also be cleared if a change in the video standard is detected, or under the following conditions: ? reset_trst is held low ? locked is asserted low ? smpte_bypass is asserted low in slave mode in addition to the error_status re gister, a register called error_mask ( table 4-12 ) is included which allows the host in terface to select the specific error conditions that will be detected. there is one bit in the error_mask register for each type of error represented in the error_status register. the bits of the error_mask register will de fault to '0' after device reset, thus enabling all error types to be detected. the host interface may disable individual error detection by setting the corres ponding bit high in this register. error conditions are also indicated to the application layer via the status signal pin data_error . this output pin is a logical 'or'in g of each error status flag stored in the error_status register. data_error is normally high, but will be set low by the device when an error condition that has not been masked is detected.
gs1559 data sheet 30572 - 4 july 2005 52 of 74 table 4-11: host interface descri ption for error status register register name bit name description r/w default error_status address: 001h 15-11 ? not used. 10 vd_std_err video standard error flag. set high when a mismatch between the received smpte352m packets and the calculated video standard occurs. r0 9 ff_crc_err full field crc error flag. set high in sd mode when a full field (ff) crc mismatch has been detected in field 1 or 2. r0 8 ap_crc_err active picture crc error flag. set high in sd mode when an active picture ( ap) crc mismatch has been detected in field 1 or 2. r0 7 lock_err lock error flag. set high whenever the lock pin is low (indicating the device not correctly locked). r0 6 ccs_err chroma checksum error flag. set high when ancillary data packet checksum error has been detected in the c channel. r0 5 ycs_err luma checksum error flag. set high when ancillary data packet checksum error has been detected in the y channel. r0 4 ccrc_err chroma crc error flag. set high in hd mode when a mismatch occurs between the calculated and received crc values in the c channel. r0 3 ycrc_err luma crc error flag. set high in hd mode when a mismatch occurs between the calculated and received crc values in the y channel. r0 2 lnum_err line number error flag. set high in hd mode when a mismatch occurs between the calculated and received line numbers. r0 1 sav_err start of active video error flag. set high when trs errors are detected in either 8-bit or 10-bit trs words. in hd mode only y channel trs codes will be checked. fw_en/dis must be set high. r0 0 eav_err end of active video error flag. set high when trs errors are detected in either 8-bit or 10-bit trs words. in hd mode only y channel trs codes will be checked. fw_en/dis must be set high. r0
gs1559 data sheet 30572 - 4 july 2005 53 of 74 4.10.5.1 video standard error detection if a mismatch between the received smpte 352m packets and the calculated video standard occurs, the gs1559 will in dicate a video standar d error by setting the vd_std_err bit of the e rror_status re gister high. 4.10.5.2 edh crc error detection the gs1559 calculates full field (ff) and active picture (ap) crc words according to smpte rp165 in support of error detection and handling packets in sd signals. these calculated crc values are compared with the received crc values. if a mismatch is detected, the error is flagged in the ap_crc_err and/or ff_crc_err bits of the error_status register. these two flags are shared between fields 1 and 2. the ap_crc_err bit will be set high when an active picture crc mismatch has been detected in field 1 or 2. the ff_ crc_err bit will be set high when a full field crc mismatch has been detected in field 1 or 2. edh crc errors will only be indicated w hen the device is operating in sd mode (sd/hd = high), and when the device ha s correctly received edh packets. smpte rp165 specifies the calculation ranges and scope of edh data for standard 525 and 625 component digita l interfaces. the gs1559 will utilize these standard ranges by default. table 4-12: host interface description for error mask register register name bit name description r/w default error_mask address: 01ah 15-11 ? not used. ? ? 10 vd_std_err_mask video standard error flag mask bit. r/w 0 9 ff_crc_err_mask full field crc error flag mask bit. r/w 0 8 ap_crc_err_mask active picture crc error flag mask bit. r/w 0 7 lock_err_mask lock error flag mask bit. r/w 0 6 ccs_err_mask chroma checksum error flag mask bit. r/w 0 5 ycs_err_mask luma checksum error flag mask bit. r/w 0 4 ccrc_err_mask chroma crc error flag mask bit. r/w 0 3 ycrc_err_mask luma crc error flag mask bit. r/w 0 2 lnum_err_mask line number error flag mask bit. r/w 0 1 sav_err_mask start of active video error flag mask bit. r/w 0 0 eav_err_mask end of active video error flag mask bit. r/w 0
gs1559 data sheet 30572 - 4 july 2005 54 of 74 if the received video format does not correspond to 525 or 625 digital component video standards as determined by the flywheel pixel and line counters, then one of two schemes for determining the edh calculation ranges will be employed: 1. ranges will be based on the line and pixel ranges programmed by the host interface; or 2. in the absence of us er-programmed ca lculation ranges, ranges will be determined from the received trs timing information. the registers available to the host interface for programming edh calculation ranges include active picture and full fi eld line start and end positions for both fields. table 4-13 shows the relevant registers, wh ich default to '0' after device reset. if any or all of these register values are zero, then the edh crc calculation ranges will be determined from the flywheel genera ted h signal. the first active and full field pixel will always be the first pixel afte r the sav trs code word. the last active and full field pixel will always be the last pixel before the star t of the eav trs code words. table 4-13: host interface description for edh calculatio n range registers register name bit name description r/w default ap_line_start_f0 address: 012h 15-10 ? not used. ? ? 9-0 ap_line_start_f0[9:0] field 0 active picture start line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ap_line_end_f0 address: 013h 15-10 ? not used. ? ? 9-0 ap_line_end_f0[9:0] field 0 active picture end line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ap_line_start_f1 address: 014h 15-10 ? not used. ? ? 9-0 ap_line_start_f1[9:0] field 1 active picture end line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ap_line_end_f1 address: 015h 15-10 ? not used. ? ? 9-0 ap_line_end_f1[9:0] field 1 active picture end line data used to set edh calculation range outside of smpte rp 165 values. r/w 0
gs1559 data sheet 30572 - 4 july 2005 55 of 74 4.10.5.3 lock error detection the locked pin of the gs1559 indicates th e lock status of the reclocker and lock detect blocks of the device. only when th e locked pin is asserted high has the device correctly locked to th e received data stream, (see lock detect on page 31 ). the gs1559 will also indicate lock error to the host interface when locked = low by setting the lock_err bit in the error_status register high. 4.10.5.4 ancillary data checksum error detection the gs1559 will calculate checksums for all received ancillary data and compare the calculated values to the received ch ecksum words. if a mismatch is detected, the error is flagged in the ccs_err and/or ycs_err bits of the error_status register. when operating in hd mode, (sd/hd = low), the device will make comparisons on both the y and c channels separately. if an error condition in the y channel is detected, the ycs_err bit will be set high. if an error condition in the c channel is detected, the ccs_err bit will be set high. when operating in sd mode, (sd/hd = high), only the ycs_err bit will be set high when checksum errors are detected. although the gs1559 will calc ulate and compare checksum values for all ancillary data types by default, the host interfac e may program the device to check only certain types of ancilla ry data checksums. this is accomplished via the anc_type register as described in programmable ancillary data detection on page 45 . ff_line_start_f0 address: 016h 15-10 ? not used. ? ? 9-0 ff_line_start_f0[9:0] field 0 full field start line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ff_line_end_f0 address: 017h 15-10 ? not used. ? ? 9-0 ff_line_end_f0[9:0] field 0 full field start line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ff_line_start_f1 address: 018h 15-10 ? not used. ? ? 9-0 ff_line_start_f1[9:0] field 1 full field start line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 ff_line_end_f1 address: 019h 15-10 ? not used. ? ? 9-0 ff_line_end_f1[9:0] field 1 full field end line data used to set edh calculation range outside of smpte rp 165 values. r/w 0 table 4-13: host interface description for ed h calculation range re gisters (continued) register name bit name description r/w default
gs1559 data sheet 30572 - 4 july 2005 56 of 74 4.10.5.5 line based crc error detection the gs1559 will calculate line based crc wo rds for hd video signals for both the y and c data channels. these calculated crc values are compared with the received crc values and any mismatch is flagged in th e ycrc_err and/or ccrc_err bits of the error_status register. line based crc error flags will only be generated when th e device is operating in hd mode, (sd/hd = low). if a crc error is detected in the y channe l, the ycrc_err bit in the error status register will be set high. if a crc erro r is detected in the c channel, the ccrc_err bit in the error status regist er is set high. y and c crc errors will also be generated if crc values are not received. 4.10.5.6 hd line number error detection when operating in hd m ode, the gs1559 will calculate line numbers based on the timing generated by the internal flywhee l. these calculated line numbers are compared with the received line numbers fo r the y channel data and any mismatch is flagged in the lnum_err bit of the error_status. line number errors will also be generated if line number values are not received. 4.10.5.7 trs error detection trs errors flags are generated by the gs1559 when: 1. the received trs timing does not corr espond to the internal flywheel timing; or 2. the received trs hamming codes are incorrect. both 8-bit and 10-bit sav and eav trs wo rds are checked for timing and data integrity errors. these are flagged via the sav_err an d/or eav_err bits of the error_status register. timing-based trs errors will only be generated if the fw_en/dis pin is set high. note: in hd mode, (sd/hd = low), only the y channel trs codes will be checked for errors.
gs1559 data sheet 30572 - 4 july 2005 57 of 74 4.10.6 error correction and insertion in addition to signal error detection and indication, the gs1559 may also correct certain types of errors by inserting correc ted code words, checksums and crc values into the data stream. these featur es are only available in smpte mode and ioproc_en/ dis must be set high. individual correction features may be enabled or disabled via the ioproc_disable register ( table 4-14 ). all of the ioproc_disable register bits de fault to '0' after device reset, enabling all of the processing features. to disable any individual error correction feature, the host interface must set the correspo nding bit high in the ioproc_disable register. table 4-14: host interface description fo r internal processing disable register register name bit name description r/w default ioproc_disable address: 000h 15-9 ? not used. ? ? 8 h_config horizontal sync timing output configuration. set low for active line blanking timing. set high for h blanking based on the h bit setting of the trs words. see figure 4-2 . 0 7-6 ? not used. ? ? 5 illegal_remap illegal code re-ma pping. correction of illegal code words within the active picture. set high to disable. the ioproc_en/dis pin must be set high. r/w 0 4 edh_crc_ins error detection & handling (edh) cyclical redundancy check (crc) error correction insertion. in sd mode set high to disable. the ioproc_en/dis pin must be set high. r/w 0 3 anc_csum_ins ancillary data check-sum insertion. set high to disable. the ioproc_en/dis pin must be set high. r/w 0 2 crc_ins y and c line based crc insertion. in hd mode, inserts line based crc words in both the y and c channels. set high to disable. the ioproc_en/dis pin must be set high. r/w 0 1 lnum_ins y and c line number insertion. in hd mode set high to disable. the ioproc_en/dis pin must be set high. r/w 0 0 trs_ins timing reference signal insertion. set high to disable. the ioproc_en/dis pin must be set high. r/w 0
gs1559 data sheet 30572 - 4 july 2005 58 of 74 4.10.6.1 illegal code remapping if the illegal_remap bit of the iopr oc_disable register is set low, the gs1559 will remap all codes within the acti ve picture between the values of 3fch and 3ffh to 3fbh. all codes within the ac tive picture area between the values of 000h and 003h will be re-map ped to 004h. in addition, 8-bit trs and ancillary data preambles will be remapped to 10-bit values if this feature is enabled. 4.10.6.2 edh crc error correction the gs1559 will generat e and insert active picture and full field crc words into the edh data packets received by the device. this feature is only available in sd mode and is enabl ed by setting the edh_crc_ins bit of the ioproc_disable register low. edh crc calculation ranges are described in edh crc error detection on page 53 . note: although the gs1559 will modify and insert edh crc words and edh packet checksums, edh er ror flags will not be up dated by the device. 4.10.6.3 ancillary data ch ecksum error correction when ancillary data checksum error correc tion and insertion is enabled, the gs1559 will generate and in sert ancillary data checksums for all ancillary data words by default. where user specified ancillary data has b een programmed into the device ( programmable ancillary data detection on page 45 ), only the checksums for the prog rammed ancillary data ty pes will be corrected. this feature is enabled when the anc_csum_ins bi t of the ioproc_disable register is set low. 4.10.6.4 line based crc correction the gs1559 will generat e and insert line based crc wo rds into both the y and c channels of the data stream. this featur e is only available in hd mode and is enabled by setting the crc_ins bit of the iopr oc_disable register low. 4.10.6.5 hd line number error correction in hd mode, the gs1559 will calculate a nd insert line numbers into the y and c channels of the output data stream. line number generation is in accordance with the relevant hd video standard as determined by the device, (see automatic video standard and data format detection on page 47 ). this feature is enabled when sd/hd = low, and the lnum_ins bit of the ioproc_disable register is set low.
gs1559 data sheet 30572 - 4 july 2005 59 of 74 4.10.6.6 trs error correction when trs error correction and insertion is enabled, the gs1559 will generate and insert 10-bit trs code words as required. trs word generation will be performed in accord ance with the timing parameters generated by the flywheel to provide an element of noise immunity. as a result, trs correction will only take place if th e flywheel is en abled, (fw_en/dis = high). in addition, the trs_ins bit of the io proc_disable register must be set low. 4.10.7 edh flag detection as described in edh crc error detection on page 53 , the gs1559 can detect edh packets in the received data stream. the edh flags for ancillary data, active picture and full field areas are extracted fr om the detected edh packets and placed in the edh_flag register of the device ( table 4-15 ). one set of flags is provided for both fields 1 and 2. field 1 flag data will be overwritten by field 2 flag data. the edh_flag register may be read by th e host interface at any time during the received frame except on the lines defined in smpte rp165 where these flags are updated. note 1: by programming the anc_type1 register (005h) with the did word for edh ancillary packets, the application layer may detect a high-to- low transition on either the yanc or canc output pin of the gs1559 to determine (a) when edh packets have been received by the device, and (b) when the edh_flag register can be read by the host interface. see ancillary data detection and indication on page 43 for more inform ation on ancillary data de tection and indication. note 2: the bits of the edh_flag regist er are sticky and will not be cleared by a read operation. if the gs1559 is decoding a source containing edh packets, where edh flags may be set, and the so urce is replaced by one without edh packets, the edh_flag re gister will not be cleared. note 3: the gs1559 will detect edh flags, but will not update the flags if an edh crc error is detected. gennum's gs1532 mu lti-rate serializer allows the host to individually set edh flags.
gs1559 data sheet 30572 - 4 july 2005 60 of 74 table 4-15: host interface desc ription for edh flag register register name bit name description r/w default edh_flag address: 003h 15 ? not used. ? ? 14 anc-ues out ancillary unknown error status flag. r 0 13 anc-ida out ancillary internal device error detected already flag. r 0 12 anc-idh out ancillary internal device error detected here flag. r 0 11 anc-eda out ancillary error detected already flag. r 0 10 anc-edh out ancillary error detected here flag. r 0 9 ff-ues out full field unknown error status flag. r 0 8 ff-ida out full field internal dev ice error detected already flag. r 0 7 ff-idh out full field internal device error detected here flag. r 0 6 ff-eda out full field error detected already flag. r 0 5 ff-edh out full field error detected here flag. r 0 4 ap-ues out active picture unknown error status flag. r 0 3 ap-ida out active picture internal device error detected already flag. r 0 2 ap-idh out active picture internal device error detected here flag. r 0 1 ap-eda out active picture error detected already flag. r 0 0 ap-edh out active picture error detected here flag. r 0
gs1559 data sheet 30572 - 4 july 2005 61 of 74 4.11 parallel data outputs data outputs leave the device on the rising edge of pclk as shown in figure 4-7 and figure 4-8 . the data may be scrambled or unscramb led, framed or unframed, and may be presented in 10-bit or 20-bit format. the output data bus width is controlled independently from the internal data bus width by the 20bit/10bit input pin. likewise, the output data format is defined by the setting of the external sd/hd , smpte_bypass and dvb_asi pins. recall that in slave mode, these pins are set by the application layer as inputs to t he device. in master mode, however, the gs1559 sets these pins as output status signals. 4.11.1 parallel data bus buffers the parallel data outputs of the gs1559 are driven by high-impedance buffers which support both lvttl and lvcmos levels. these buffers use a separate power supply of +3.3v dc supplied via the io_vdd and io_gnd pins. all output buffers, including the pclk output, may be driven to a high-impedance state if the reset_trst signal is asserted low. note that the timing characteristics of the parallel data output buffers are optimized for 10-bit hd operation. as shown in figure 4-7 , the output data hold time for hd is 1.5ns. due to this optimization, however, the output data hold time for sd data is so small that the rising edge of the pclk is nearly incident with the data transition. to improve output hold time at sd rates, the pclk output is inverted is sd mode, (sd/hd = high). this is shown in figure 4-8 . figure 4-7: hd pclk to data timing pclk dout[19:0] data control signal output t oh t od hd mode
gs1559 data sheet 30572 - 4 july 2005 62 of 74 figure 4-8: sd pclk to data timing 4.11.2 parallel output in smpte mode when the device is operating in smpte mode, (see smpte functionality on page 34 ), both sd and hd data may be presented to the output bus in either multiplexed or demultiplexed form depending on the setting of the 20bit/10bit input pin. in 20-bit mode, (20bit/10bit = high), the output da ta will be word aligned, demultiplexed luma and chroma data. luma word s will always appear on dout[19:10] while chroma words will o ccupy dout[9:0]. in 10-bit mode, (20bit/10bit = low), the output data will be word aligned, multiplexed luma and chroma data. the data will be pr esented on dout[19:10], and the device will force dout[9:0] low. 4.11.3 parallel output in dvb-asi mode when operating in dvb-asi mode, (see dvb-asi functionality on page 41 ), the gs1559 automatically configures the output port for 10-bit operation regardless of the setting of the 20bit/10bit pin. the extracted 8-bit data words will be presented on dout[1 7:10] such that dout17 = hout is the most significant bi t of the decoded transport stream data and dout10 = aout is th e least significant bit. in addition, dout19 and dout18 will be configured as the dvb-asi status signals syncout and worderr respectively. see status signal outputs on page 41 for a description of these dvb-asi specific output signals. dout[9:0] will be forced low when the gs1559 is operating in dvb-asi mode. 4.11.4 parallel output in data-through mode when operating in data-through mode, (see data through mode on page 42 ), the gs1559 presents data to the output da ta bus without performing any decoding, descrambling or word-alignment. pclk dout[19:0] data control signal output t oh t od sd mode
gs1559 data sheet 30572 - 4 july 2005 63 of 74 as described in data through mode on page 42 , the data bus outputs will be forced to logic low if the device is se t to operate in master mode but cannot identify smpte trs id or dvb-asi syn c words in the input data stream. 4.11.5 parallel output clock (pclk) the frequency of the pclk output signal of the gs1559 is determined by the output data format. table 4-16 below lists the possible output signal formats and their corresponding parallel clock rates. note that dvb- asi output will always be in 10-bit format, regard less of the setting of the 20bit/10bit pin. table 4-16: parallel data output format output data format dout [19:10] dout [9:0] pclk status / control signals* 20bit/ 10bit sd/hd smpte_bypass dvb_asi smpte mode 20bit demultiplexed sd luma chroma 13.5mhz high high high low 10bit multiplexed sd luma / chroma forced low 27mhz low high high low 20bit demultiplexed hd luma chroma 74.25 or 74.25/ 1.001mhz high low high low 10bit multiplexed hd luma / chroma forced low 148.5 or 148.5/ 1.001mhz low low high low dvb-asi mode 10bit dvb-asi dvb-asi data forced low 27mhz high high low high dvb-asi data forced low 27mhz low high low high data-through mode** 20bit demultiplexed sd data data 13.5mhz high high low low 10bit multiplexed sd data forced low 27mhz low high low low 20bit demultiplexed hd data data 74.25 or 74.25/ 1.001mhz high low low low 10bit multiplexed hd data forced low 148.5 or 148.5/ 1.001mhz low low low low *note1: recall that sd/hd , smpte_bypass , and dvb_asi are input control pins in slave m ode to be set by the application layer, but are output status signals set by the device in master mode. **note 2: data-through mode is only available in slave mode data through mode on page 42 .
gs1559 data sheet 30572 - 4 july 2005 64 of 74 4.12 gspi host interface the gspi, or gennum serial peripheral interface, is a 4-wire interface provided to allow the host to enable additional features of the device and /or to provide additional status information through configuration registers in the gs1559. the gspi comprises a serial data inpu t signal sdin, serial data output signal sdout, an active low chip select cs , and a burst clock sclk. the burst clock must have a duty cycle between 40% and 60%. because these pins are shared with the jtag interface port, an additional control signal pin jtag/host is provided. when jtag/host is low, the gspi interface is enabled. when operating in gspi mode, the sclk, sdin, and cs signals are provided by the host interface. the sdout pin is a high-impedance output allowing multiple devices to be connected in parallel and selected via the cs input. the interface is illustrated in figure 4-9 . all read or write access to the gs1559 is initiated and terminated by the host processor. each access always begins with a 16-bit command word on sdin indicating the address of the register of interest. this is followed by a 16-bit data word on sdin in write mode, or a 16-bit data word on sdout in read mode. figure 4-9: gennum serial peripheral interface (gspi) 4.12.1 command word description the command word is transmitted msb firs t and contains a read/write bit, nine reserved bits and a 6-bit register address. set r/w = '1' to read and r/w = '0' to write from the gspi. command words are clocked into the gs1559 on the rising edge of the serial clock sclk. the appropriate chip select, cs , signal must be asserted low a minimum of 1.5ns (t 0 in figure 4-12 and figure 4-13 ) before the first clock edge to ensure proper operation. each command word must be followed by only one data word to ensure proper operation. sclk cs sdout sdin sclk cs sdin sdout application host gs1559
gs1559 data sheet 30572 - 4 july 2005 65 of 74 figure 4-10: command word figure 4-11: data word 4.12.2 data read and write timing read and write mode timing for the gspi interface is shown in figure 4-12 and figure 4-13 respectively. the maximum sclk frequency allowed is 6.6mhz. when writing to the regist ers via the gspi, the msb of the data word may be presented to sdin immediately followin g the falling edge of the lsb of the command word. all sdin data is sampled on the rising edge of sclk. when reading from the regi sters via the gspi, the msb of the data word will be available on sdout 12ns following the falling edge of the lsb of the command word, and thus may be read by the host on the very next rising edge of the clock. the remaining bits are clocked out by th e gs1559 on the negative edges of sclk. figure 4-12: gspi read mode timing figure 4-13: gspi write mode timing r/w rsv rsv rsv a0 a1 a2 a3 a4 a5 rsv rsv rsv rsv rsv rsv msb lsb d15 d14 d13 d12 d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 d11 d10 msb lsb sdout r/w rsv rsv a0 a1 a2 a3 a4 a5 rsv rsv rsv rsv rsv rsv d15 d14 d13 d12 d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 d11 d10 sclk cs sdin rsv t 0 t 2 t 3 input data setup time duty cycle t 4 period t 5 t 6 output data hold time r/w rsv rsv a0 a1 a2 a3 a4 a5 rsv rsv rsv rsv rsv rsv d15 d14 d13 d12 d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 d11 d10 sclk cs sdin rsv t 0 t 2 t 3 input data setup time duty cycle t 4 period
gs1559 data sheet 30572 - 4 july 2005 66 of 74 4.12.3 configuration and status registers table 4-17 summarizes the gs1559's internal st atus and configuration registers. all of these registers are available to the host via the gspi and are all individually addressable. where status registers contain less than th e full 16 bits of information however, two or more registers may be combined at a single logical address. table 4-17: gs1559 internal registers address register name see section 000h ioproc_disable section 4.10.6 001h error_status section 4.10.5 003h edh_flag section 4.10.7 004h video_standard section 4.10.4 005h - 009h anc_type section 4.10.2.1 00ch - 00dh video_format section 4.10.3 00eh - 011h raster_structure section 4.10.4 012h - 019h edh_calc_ranges section 4.10.5.2 01ah error_mask section 4.10.5
gs1559 data sheet 30572 - 4 july 2005 67 of 74 4.13 jtag when the jtag/host input pin of the gs1559 is se t high, the host interface port will be configured for jtag test operation. in this mode , pins h4 to h6 and j6 become tms, tck, tdo, and tdi. in addition, the reset_trst pin will operate as the test reset pin. boundary scan testing using the jtag interface will be enabl ed in this mode. there are two methods in which jtag can be used on the gs1559: 1. as a stand-alone jtag interface to be used at in-circuit ate (automatic test equipment) during pcb assembly; or 2. under control of the host for applications such as system power on self tests. when the jtag tests are applied by ate, care must be taken to disable any other devices driving the digital i/o pins. if the te sts are to be applied only at ate, this can be accomplished with tri-state bu ffers used in conjunction with the jtag/host input signal. this is shown in figure 4-14 . figure 4-14: in-circuit jtag alternatively, if the test ca pabilities are to be used in the system, the host may still control the jtag/host input signal, but some means for tri-stating the host must exist in order to use the interface at ate. this is represented in figure 4-15 . figure 4-15: system jtag please contact your gennum representative to obtain the bsdl model for the gs1559. application host gs1559 cs_tms sclk_tck sdin_tdi sdout_tdo jtag_host in-circuit ate probe application host gs1559 cs_tms sclk_tck sdin_tdi sdout_tdo jtag_host in-circuit ate probe tri-state
gs1559 data sheet 30572 - 4 july 2005 68 of 74 4.14 device power up the gs1559 has a recommended power supply sequence. to ensure correct power up, power the core_vdd pins before the io_vdd pins. device pins may also be driven prio r to power up without causing damage. to ensure that all internal registers are cleared upon power-up, the application layer must hold the reset_trst signal low for a minimum of 1ms after the core power supply has reached the minimum level specified in dc electrical characteristics on page 16 . see figure 4-16 . 4.15 device reset in order to initialize all in ternal operating conditions to their default states the application layer must hold the reset_trst signal low for a minimum of t reset = 1ms. when held in reset, all device outputs will be driven to a high-impedance state. figure 4-16: reset pulse core_vdd reset_trst t reset +1.65v +1.8v reset reset t reset
gs1559 data sheet 30572 - 4 july 2005 69 of 74 5. application reference design 5.1 typical application circuit (part a) gs1574a sdi cd sdi vee_d mute vcc_d agc bypass mcladj vee_a note: all resistors in ohms, capacitors in farads, and inductors in henrys, unless otherwise noted. vee_a agc vcc_a sdo sdo vee_d 10n 1 10n sdo 4u7 4u7 + + sdo cd mute bypass mcladj 470n 6.2n 75 sdi 1u 75 1u 37r4 eq_vcc 4 5 6 2 3 8 7 16 12 13 11 14 15 9 10 470n eq_vcc eq_gnd eq_gnd eq_gnd eq_gnd eq_gnd eq_gnd eq_gnd
gs1559 data sheet 30572 - 4 july 2005 70 of 74 5.2 typical application circuit (part b) gs1559 vco_gnd vco_vcc a2 a3 vco vco lf a5 a4 a1 cp_cap lb_cont vco_vcc 1u 10n gnd_vco vco_vcc vco_vcc go1525 5 4 8 2 7 1 3 6 vctr gnd gnd gnd vcc o/p nc gnd 10n 10n 4k75 +/- 1% gnd_vco gnd_vco gnd_vco gnd_vco gnd_vco 100n 0 39k2 2n2 gnd_vco gnd_vco b1 b4 +3.3v cp_vdd cp_gnd 0 1u 1u 10n 10n 0 gnd_a +1.8v_a 10n gnd_a dout18 dout19 data[19..0] data18 data19 a9 a10 data0 data1 dout1 dout0 k10 k9 data12 data13 data14 data16 data17 data15 dout13 dout12 dout14 dout15 dout16 dout17 data11 data10 data9 dout9 dout10 dout11 f10 data7 data8 data3 data6 data2 data4 data5 dout2 dout3 dout4 dout5 dout6 dout7 dout8 j10 j9 h10 h9 g10 g9 f9 e9 e10 d9 d10 c9 c10 b9 b10 a6 b5 b6 c4 c5 d2 d3 d7 e3 e7 f2 f7 f3 g2 g7 g3 h3 j2 j4 j3 term1 10n gnd_eq e2 cd1 ddi_1 f1 d1 e1 term2 10n gnd_eq h2 ddi_2 ddi_2 ddi2 4u7 ddi2 4u7 cd2 j1 g1 h1 rset +1.8v_a 281 +/-1% 10n k1 ddi_1 b7 c7 c6 d5 d4 e4 f4 g4 g5 j5 k6 h4 h6 j6 h5 g6 reset_trst ipsel fw_en/dis jtag/host master/slave dvb_asi rc_byp smpte_bypass sd/hd sclk_tck sdout_tdo sdin_tdi cs_tms ipsel 20bit/10bit ioproc_en/dis sdo_en/dis fw_en/dis jtag/host master/slave dvb_asi rc_byp sclk_tck sdout_tdo sdin_tdi cs_tms reset_trst 20bit/10bit ioproc_en/dis sdo_en/dis ipsel fw_en/dis jtag/host master/slave dvb_asi rc_byp smpte_bypass sd/hd sclk_tck sdout_tdo sdin_tdi cs_tms reset_trst sclk_tck sdout_tdo sdin_tdi ipsel 20bit/10bit ioproc_en/dis sdo_en/dis fw_en/dis jtag/host master/slave 2k2 2k2 2k2 2k2 dvb_asi rc_byp note: smpte_bypass, sd/hd, dvb_asi, and rc_byp are inputs in slave mode (master/slave = low), and are outputs in master mode (master/slave = high). smpte_bypass sd/hd reset_trst sclk_tck sdout_tdo sdin_tdi ipsel 20bit/10bit ioproc_en/dis sdo_en/dis fw_en/dis jtag/host master/slave dvb_asi rc_byp smpte_bypass sd/hd cs_tms cs_tms 75 pclk data_error lock canc fifo_ld yanc f v h pclk data_error lock canc fifo_ld yanc f v h a7 c8 d8 d6 h7 g8 k7 j7 h8 pclk data_error locked canc fifo_ld yanc f v h pclk data_error lock canc fifo_ld yanc f v h core_vdd core_gnd e6 e5 core_gnd core_vdd f5 f6 io_gnd io_vdd j8 k8 io_gnd io_vdd f8 e8 io_vdd io_gnd a8 b8 sdo sdo +1.8v_a 75 75 10n to the gs1528a cable driver gnd_a k3 k4 cd_vdd cd_gnd k2 k5 cp_vdd cp_gnd b3 b2 pdbuff_gnd pd_vdd buff_vdd c3 c2 c1 core_vdd core_gnd core_gnd core_vdd io_gnd io_vdd io_gnd io_vdd io_vdd io_gnd cp_vdd cp_gnd pdbuff_gnd pd_vdd buff_vdd +3.3v io_gnd io_vdd 1u 10n gnd_d +3.3v io_gnd io_vdd 1u 10n gnd_d +3.3v io_gnd io_vdd 1u 10n gnd_d +1.8v core_gnd core_vdd 10n gnd_d +1.8v core_gnd core_vdd 10n gnd_d pdbuff_gnd pd_vdd buff_vdd +1.8v 10n gnd_a note: see gennum's reference design: "interfacing the gs1532 to the gs1528 multi-rate cable driver" +3.3v +1.8v_a 0 gnd_d cd 4k75 +/- 1%
gs1559 data sheet 30572 - 4 july 2005 71 of 74 6. references & relevant standards smpte 125m component video signal 4:2:2 ? bit parallel interface smpte 260m 1125 / 60 high definition production system ? digital representation and bit parallel interface smpte 267m bit parallel digital interface ? component video signal 4:2:2 16 x 9 aspect ratio smpte 274m 1920 x 1080 scanning analog and parallel digital interfaces for multiple picture rates smpte 291m ancillary data pa cket and space formatting smpte 292m bit-serial digital interface for high-definition television systems smpte 293m 720 x 483 active line at 59.94 hz progressive scan production ? digital representation smpte 296m 1280 x 720 scanning, analog and digita l representation and analog interface smpte 352m video payload identification for digital television interfaces smpte rp165 error detection checkwords and st atus flags for use in bit-serial digital interfaces for television smpte rp168 definition of vertical interv al switching point for synchronous video switching
gs1559 data sheet 30572 - 4 july 2005 72 of 74 7. package & ordering information 7.1 package dimensions
gs1559 data sheet 30572 - 4 july 2005 73 of 74 7.2 packaging data 7.3 ordering information parameter value package type 11mm x 11mm 100-ball lbga package drawing reference jedec m0192 moisture saturation level 3 junction to case thermal resistance, j-c 10.4c/w junction to air thermal resistance, j-a (at zero airflow) 37.1c/w psi 0.4c/w pb-free yes part number package pb-free package temperature range GS1559-CBe2 100-ball bga yes 0c to 70c GS1559-CB 100-ball bga no 0c to 70c
caution electrostatic sensitive devices do not open packages or handle except at a static-free workstation gennum corporation mailing address: p.o. box 489, stn. a, burlington, ontario, canada l7r 3y3 shipping address: 970 fraser drive, burlington, ontario, canada l7l 5p5 tel. +1 (905) 632-2996 fax. +1 (905) 632-5946 gennum japan corporation shinjuku green tower building 27f, 6-14-1, nish i shinjuku, shinjuku-ku, tokyo, 160-0023 japan tel. +81 (03) 3349-5501, fax. +81 (03) 3349-5505 gennum uk limited 25 long garden walk, farnham, surrey, england gu9 7hx tel. +44 (0)1252 747 000 fax +44 (0)1252 726 523 gennum corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. the sale of the circuit or device described herein does not imply any patent license, and gennum makes no representation that the circuit or device is free from patent infringement. gennum and the g logo are registered trademarks of gennum corporation. ? copyright 2004 gennum corporation. all rights reserved. printed in canada. gs1559 data sheet 30572 - 4 july 2005 74 74 of 74 document identification data sheet the product is in production. gen num reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. 8. revision history version ecr date changes and / or modifications a 132587 january 2004 new document. b 133566 june 2004 modify supply voltage ranges and power dissipation. modify sdo section. modify figure 3-3. add not e to host interface pins. add new solder reflow profile. apply new format. 0 134168 august 2004 modify electrical characte ristics based on characte rization of device. update text in section 2.4. modify sdo section of recommended application circuit. update to a preliminary data sheet. 1 134609 november 2004 update typical appl ication circuit a to remove cd pins from the gs1574 circuit. 2 136173 april 2005 corrected gspi input data hold time in ac electr ical characteristics table. updated sclk to show as a burst clock. removed references to part being ?green?. clarified setting of vd_std[4:0], int_prog and std_lock bits following a reset and/or removal of input. updated typical application cirucit a. corrected minor typing errors. 3 136980 june 2005 restored missing overlines. correc ted missing term pin in serial digital input connection diagram. changed note on esd protection. corrected section 4.2.3. added note on unused output to section 4.4. converted to data sheet. 4 137523 july 2005 corrected ground symbol in ty pical application circuit (part b) on page 70.

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