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wt1 1 i - e data sheet monday, 28 november 2011 v ersion 1. 0
bluegiga technologies oy copyright ? 2000 - 2011 bluegiga technologies all rights reserved. bluegiga technologies assumes no responsibility for any errors which may appear in this manual. furthermore, bluegiga technolo gies reserves the right to alter the hardware, software, and/or specifications detailed here at any time without notice and does not make any commitment to update the information contained here. bluegigas products are not authorized for use as critical co mponents in life support devices or systems. the wrap is a registered trademark of bluegiga technologies the bluetooth trademark is owned by the bluetooth sig inc., usa and is licensed to bluegiga technologies. all other trademarks listed herein are owned by their respective owners.
bluegiga technologies oy version history version comment 1.0 release
bluegiga technologies oy table of contents 1 ordering information ................................ ................................ ................................ ................................ ...... 7 2 pinout and terminal description ................................ ................................ ................................ ................... 8 3 electrical chara cteristics ................................ ................................ ................................ ............................ 11 3.1 absolute maximum ratings ................................ ................................ ................................ ................ 11 3.2 recommended operating conditions ................................ ................................ ................................ . 11 3.3 current co nsumption ................................ ................................ ................................ .......................... 11 3.4 pio current sink and source capability ................................ ................................ ............................. 12 3.5 antenna specification ................................ ................................ ................................ ......................... 12 4 physical dimensions ................................ ................................ ................................ ................................ .. 13 5 layout guidelines ................................ ................................ ................................ ................................ ....... 14 6 uart interface ................................ ................................ ................................ ................................ ........... 15 6.1 uart bypass ................................ ................................ ................................ ................................ ...... 17 6.2 uart configuration while reset is active ................................ ................................ ......................... 17 6.3 uart bypass mode ................................ ................................ ................................ ............................ 17 7 usb interface ................................ ................................ ................................ ................................ ............. 18 7.1 usb data connections ................................ ................................ ................................ ....................... 18 7.2 usb pull - up resistor ................................ ................................ ................................ ........................... 18 7.3 usb power supply ................................ ................................ ................................ .............................. 18 7.4 self - powered mode ................................ ................................ ................................ ............................. 18 7.5 bus - powered mode ................................ ................................ ................................ ............................. 19 7.6 usb suspend current ................................ ................................ ................................ ......................... 20 7.7 usb detach and wake - up signaling ................................ ................................ ................................ .. 20 7.8 usb driver ................................ ................................ ................................ ................................ .......... 21 7.9 usb v2.0 compliance and compatibility ................................ ................................ ............................ 21 8 serial peripheral interface (spi) ................................ ................................ ................................ ................. 22 9 pcm codec interface ................................ ................................ ................................ ................................ . 23 9.1 pcm interface master/slave ................................ ................................ ................................ ............... 23 9.2 long frame sync ................................ ................................ ................................ ................................ 24 9.3 short frame sync ................................ ................................ ................................ ............................... 24 9.4 multi - slot operation ................................ ................................ ................................ ............................. 25 9.5 gci interface ................................ ................................ ................................ ................................ ....... 25 9.6 slots and sample formats ................................ ................................ ................................ .................. 26 9.7 additional features ................................ ................................ ................................ ............................. 27 9.8 pcm_clk and pcm_sync generation ................................ ................................ ............................ 27 9.9 pcm configur ation ................................ ................................ ................................ .............................. 28 10 i/o parallel ports ................................ ................................ ................................ ................................ ..... 30 10.1 pio defaults ................................ ................................ ................................ ................................ . 30
bluegiga technologies oy 11 reset ................................ ................................ ................................ ................................ ....................... 31 11.1 pin states on reset ................................ ................................ ................................ ..................... 31 12 certifications ................................ ................................ ................................ ................................ ........... 32 12.1 bluetooth ................................ ................................ ................................ ................................ ...... 32 12.2 fcc and ic ................................ ................................ ................................ ................................ .. 32 12.2.1 fcc et ic ................................ ................................ ................................ ................................ ..... 34 12.3 ce ................................ ................................ ................................ ................................ ................ 36 12.4 qualified antenna types for wt11i - e ................................ ................................ ......................... 36 13 contact information ................................ ................................ ................................ ................................ . 38
bluegiga technologies oy wt11i bluetooth? module description wt11i is a fully integrated bluetooth 2.1 + edr, class 1 module combining antenna, bluetooth radio and an on - board blue tooth stack. the wt11i module utilizes bluegiga's latest generation rf technology and provides better performance than its predecessor wt11. for oem's wt11i offers trouble free bluetooth integration for applications where the best performance is needed and its a drop - in performance upgrade for designs where wt11 is already used. wt11i comes with bluegiga's iwrap firmware offering the users simple software integration without the need of bluetooth protocol or profile development. applications : ? hand held terminals ? industrial devices ? point - of - sale systems ? pcs ? personal digital assistants (pdas) ? computer accessories ? access points ? automotive diagnostics units features: ? bluetooth v.2.1 + edr, class 1 ? chip antenna ? radio performance o transmit power : +17 dbm o r eceiver sensitivity: - 83 dbm ? interfaces: o usb (2.0 compatible) o uart with flow control o 6 x gpio o 1 x 8 - bit aio o 802.11 co - existence ? integrated iwrap bluetooth stack o 12 integrated bluetooth profiles o s imple ascii based host protocol ? standard hci over uart or us b ? industrial temperature range: - 40 c to +85 c ? bluetooth end product, ce, fcc and ic and telec qualified physical outlook
bluegiga technologies oy page 7 of 38 1 ordering information wt11i - e - hci product series fimrware hci 21 = hci firmware (bluetooth 2. 1 + edr) ai3 = iwrap 3.0.0 ai4 = iw rap 4.0.0 c = c u stom* hw version a = chip antenna, extended temperature range
bluegiga technologies oy page 8 of 38 2 pinout and terminal description figure 1 : wt11i connection diagram table 1 : supply and rf terminal descriptions wt11i gnd vdd_pa pio2 pio3 uart_rts# uart_rx pcm_out usb+ usb - uart_cts# pcm_in pcm_clk pcm_sync gnd gnd aio uart_tx pio5 spi_mosi spi_miso spi_clk spi_cs# pio4 pio7 pio6 reset vdd gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 pin number pad type description reset 17 input, internal 220kohm pull-down, internal start up reset circuitry active high reset. keep high for >5 ms to cause a reset gnd 1, 14, 15, 28 gnd gnd vdd_pa 2 supply voltage supply voltage for the rf power amplifier vdd 16 supply voltage supply voltage for bc4 and the flash memory
bluegiga technologies oy page 9 of 38 table 2 : gpio terminal descriptions table 3 : pcm terminal descriptions table 4 : uart terminal descriptions pio port pin number pad type description pio[2] 3 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line pio[3] 4 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line pio[4] 20 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line pio[5] 25 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line pio[6] 18 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line pio[7] 19 bi-directional, programmamble strength internal pull-down/pull-up programmamble input/output line aio[1] 27 bi-directional programmamble analog input/output line spi interface pin number pad type description pcm_out 7 cmos output, tri-state, weak internal pull-down synchronous data output pcm_in 11 cmos input, weak internal pull-down synchronous data input pcm_sync 13 bi-directional, weak internal pull-down synchronous data sync pcm_clk 12 bi-directional, weak internal pull-down synchronous data clock uart interfaces pin number pad type description uart_tx 26 cmos output, tri- state, with weak internal pull-up uart data output, active high uart_rts# 5 cmos output, tri- state, with weak internal pull-up uart request to send, active low uart_rx 6 cmos input, tri- state, with weak internal pull-down uart data input, active high uart_cts# 10 cmos input, tri- state, with weak internal pull-down uart clear to send, active low
bluegiga technologies oy page 10 of 38 table 5 : usb terminal descriptions table 6 : terminal descriptions usb interfaces pin number pad type description usb+ 8 bidirectional usb data plus with selectable internal 1.5k pull-up resistor usb- 9 bidirectional usb data minus spi interface pin number pad type description spi_mosi 24 cmos input with weak internal pull-down spi data input spi_cs# 21 cmos input with weak internal pull-up chip select for serial peripheral interface, active low spi_clk 22 cmos input with weak internal pull-down spi clock spi_miso 23 cmos output, tristate, with weak internal pull down spi data output
bluegiga technologies oy page 11 of 38 3 electrical characteristics 3.1 absolute maximum ratings table 7 : absolute maximum ratings 3.2 recommended operating conditions *) vdd_pa has an effect on the rf output power. table 8 : recommended operating conditions 3.3 current consumption table 9 : wt11i current consumption min max unit -40 85 c -0.4 3.6 v vss-0.4 vdd+0.4 v rating storage temperature other terminal voltages vdd_pa, vdd min max unit -40 85 c 3.0 3.6 v rating operating temperature range vdd_pa, vdd *) packet type power level max avg unit 17 dbm 170 72 12 dm 170 54 17 dbm 170 128 12 dm 170 84 2dh5 12 dm 106 93 3dh5 12 dm 106 93 rx - - - 39 sleep - - - 50 a inquiry - 17 dbm 59 ma dh1 dh5 tx ma
bluegiga technologies oy page 12 of 38 3.4 pio current sink and source capability figure 2 : wt1 1 i pio current drive capability 3.5 antenna specification
bluegiga technologies oy page 13 of 38 4 physical dimensions figure 3 : physical dimensions (top view) figure 4 : dimensions of wt11i - e 2.6mm 35.8mm 2.1mm 11.4mm 14.5mm 6.3mm 10.0mm
bluegiga technologies oy page 14 of 38 5 layout guidelines use good layo ut practices to avoid excessive noise coupling to supply voltage traces or sensitive analog signal traces, such as analog audio signals. if using overlapping ground planes use stitching vias separated by max 3 mm to avoid emission from the edges of the pcb . connect all the gnd pins directly to a solid gnd plane and make sure that there is a low impedance path for the return current following the signal and supply traces all the way from start to the end. a good practice is to dedicate one of the inner laye rs to a solid gnd plane and one of the inner layers to supply voltage planes and traces and route all the signals on top and bottom layers of the pcb. this arrangement will make sure that any return current follows the forward current as close as possible and any loops are minimized. figure 5 : typical 4 - layer pcb construction figure 6 : use of stitching vias to avoid emissions from the edges of the pcb layout ? supply voltage C if possible use solid power plane C make sure that solid gnd plane follows the traces all the way C do not route supply voltage traces across separated gnd regions so that the path for the return current is cut ? mic input C place lc filtering and dc coupling capacitors symmetrically as c lose to audio pins as possible C place mic biasing resistors symmetrically as close to microhone as possible. C make sure that the bias trace does not cross separated gnd regio ns (dgnd - > agnd) so that the path for the return current is cut. if this is not possible the do not separate gnd regions but keep one solid gnd plane. C keep the trace as short as possible signals gnd power signals recommended pcb layer configuration overlapping gnd layers without gnd stitching vias overlapping gnd layers with gnd stitching vias shielding the rf energy
bluegiga technologies oy page 15 of 38 6 uart interface this is a standard uart interfa ce for communicating with other serial devices. wt11i uart interface provides a simple mechanism for communicating with other serial devices using the rs232 protocol. four signals are used to implement the uart function . when wt11i is connected to another digital device, uart_rx and uart_tx transfer data between the two devices. the remaining two signals, uart_cts and uart_rts, can be used to implement rs232 hardware flow control where both are active low indicators. all uart connections are implemented usi ng cmos technology and have signalling levels of 0v and vdd . uart configuration parameters, such as data rate and packet format, are set using wt11i software. note: in order to communicate with the uart at its maximum data rate using a standard pc, an ac celerated serial port adapter card is required for the pc. table 10 : possible uart settings the uart interface is capable of resetting wt11i upon reception of a break signal. a break is identified by a continuous logic low (0v) on the uart_rx terminal, as shown in figure 7 . if tbrk is longer than the value, defined by pskey_host_io_uart_reset_timeout, (0x1a4), a reset will occur. this feature allows a host to initialise the system to a known state. also, wt11i can emit a break ch aracter that may be used to wake the host. figure 7 : break signal table 11 shows a list of commonly used data rates and their associated values for pskey_uart_baud_rate (0x204). there is no requirement to use these standard value s. any data rate within the supported range can be set in the ps key according to the formula in equation 1
bluegiga technologies oy page 16 of 38 equation 1 : data rate table 11 : standard data rates
bluegiga technologies oy page 17 of 38 6.1 uart bypass figure 8 : uart bypass architecture 6.2 uart configuration while reset is active the uart interface for wt11i while the chip is being held in reset is tristate. this will allow the user to daisy chain devices onto the physical uart bus. the constraint on this method is that any devices connected to this bus must tristate when wt11i reset is de - asserted and the firmware begins to run. 6.3 uart bypass mode alternatively, for devices that do not tristate the uart bus, the uart bypass mode on bluecore4 - external can be used. the default state of bluecore4 - external after reset is de - asserted; this is for the host uart bus to be connected to the bluecore4 - external uart, thereby allowing communication to bluecore4 - external via the uart. all uart bypass mode connections are implemented using cmos technology and have signalling levels of 0v and vdd . in order to apply the uart bypass mode, a bccmd command will be issued to bluecore4 - external. upon this issue, it will switch the bypass to pio[7:4] as figure 1 7 indicates. once t he bypass mode has been invoked, wt11i will enter the deep sleep state indefinitely. in order to re - establish communication with wt11i , the chip must be reset so that the default configuration takes effect. it is important for the host to ensure a clean bl uetooth disconnection of any active links before the bypass mode is invoked. therefore, it is not possible to have active bluetooth links while operating the bypass mode . the current consumption for a device in uart bypass mode is equal to the values quote d for a device in s tandby mode.
bluegiga technologies oy page 18 of 38 7 usb interface this is a full speed (12mbits/s) usb interface for communicating with other compatible digital devices. wt11i acts as a usb peripheral, responding to requests from a master host controller such as a pc. the u sb interface is capable of driving a usb cable directly. no external usb transceiver is required. the device operates as a usb peripheral, responding to requests from a master host controller such as a pc. both the ohci and the uhci standards are supported . the set of usb endpoints implemented can behave as specified in the usb section of the bluetooth v2.1 + edr specification or alternatively can appear as a set of endpoints appropriate to usb audio devices such as speakers. as usb is a master/slave orient ed system (in common with other usb peripherals), wt11i only supports usb slave operation. 7.1 usb data connections the usb data lines emerge as pins usb_dp and usb_dn. these terminals are connected to the internal usb i/o buffers of the bluecore4 - external, th erefore, have a low output impedance. to match the connection to the characteristic impedance of the usb cable, resistors must be placed in series with usb_dp/usb_dn and the cable. 7.2 usb pull - up resistor wt11i features an internal usb pull - up resistor. this pulls the usb_dp pin weakly high when wt11i is ready to enumerate. it signals to the pc that it is a full speed (12mbits/s) usb device. the usb internal pull - up is implemented as a current source, and is compliant with section 7.1.5 of the usb specificati on v1.2. the internal pull - up pulls usb_dp high to at least 2.8v when loaded with a 15k 5% pull - down resistor (in the hub/host) when vdd_pads = 3.1v. this presents a thevenin resistance to the host of at least 900. alternatively, an external 1.5k pull - up r esistor can be placed between a pio line and d+ on the usb cable. the firmware must be alerted to which mode is used by setting pskey_usb_pio_pullup appropriately. the default setting uses the internal pull - up resistor. 7.3 usb power supply the usb specificati on dictates that the minimum output high voltage for usb data lines is 2.8v. to safely meet the usb specif ication, the voltage on the vdd supply terminal must be an absolute minimum of 3.1v. bluegiga recommends 3.3v for optimal usb signal quality. 7.4 self - pow ered mode in self - powered mode, the circuit is powered from its own power supply and not from the vbus (5v) line of the usb cable. it draws only a small leakage current (below 0.5ma) from vbus on the usb cable. this is the easier mode for which to design, as the design is not limited by the power that can be drawn from the usb hub or root port. however, it requires that vbus be connected to wt11i via a resistor network (rvb1 and rvb2), so wt11i can detect when vbus is powered up. bluecore4 - external will not pull usb_dp high when vbus is off. self - powered usb designs (powered from a battery or psu) must ensure that a pio line is allocated for usb pullup purposes. a 1.5k 5% pull - up resistor between usb_dp and the selected pio line should be fitted to the desig n. failure to fit this resistor may result in the design failing to be usb compliant in self - powered mode. the internal pull - up in bluecore is only suitable for bus - powered usb devices, e.g., dongles.
bluegiga technologies oy page 19 of 38 figure 9 : usb connections fo r self - powered mode the terminal marked usb_on can be any free pio pin. the pio pin selected must be registered by setting pskey_usb_pio_vbus to the corresponding pin number. figure 10 : usb interface com ponent values **) wt11i has internal 22 ohm series resistors at the usb lines. 7.5 bus - powered mode in bus - powered mode, the application circuit draws its current from the 5v vbus supply on the usb cable. wt11i negotiates with the pc during the usb enumeration stage about how much current it is allowed to consume. on power - up the device must not draw more than 100 ma but after being configured it can draw up to 500 ma . for wt11i , the usb power descriptor should be altered to reflect the amount of power required . this is accomplished by setting pskey_usb_max_power (0x2c6). this is higher than for a class 2 application due to the extra current drawn by the transmit rf pa. b y default for wt11i the setting is 300 ma . when selecting a regulator, be aware that vbus ma y go as low as 4.4v. the inrush current (when charging reservoir and supply decoupling capacitors) is limited by the usb specification. see the usb specification. some applications may require soft start circuitry to limit inrush current if more than 10 u f is present between vbus and gnd. the 5v vbus line emerging from a pc is often electrically noisy. as well as regulation down to 3.3v and 1.8v, applications should include careful filtering of the 5v line to attenuate noise that is above the voltage regulat or bandwidth. excessive noise on wt11i supply pins will result in reduced receive r sensitivity and a distorted rf transmit signal. identifier value function r s 0 to 10 (to be matched per design)** impedance matching to usb cable r vb1 22k 5% vbus on sense divider r vb2 47k 5% vbus on sense divider
bluegiga technologies oy page 20 of 38 figure 11 : usb connections for bus - powered mode 7.6 usb suspend current all usb devices must permit t he usb controller to place them in a usb suspend mode. while in usb suspend, bus - powered d evices must not draw more than 2 .5ma from usb vbus (self - powered devices may draw more than 2 .5ma from their own supply). this current draw requirement prevents opera tion of the radio by bus - powered devices during usb suspend. when computing suspend current, the current from vbus through the bus pull - up and pull - d own resistors must be included. the pull - up resistor at the device is 1.5 k. (nominal). the pull - down resis tor at the hub is 14.25k. to 24.80k. the pull - up voltage is nominally 3.3v, which means that holding one of the signal lines high takes approximately 200ua, leaving only 2.3ma available from a 2.5ma budget. ensure that external leds and/or amplifiers can b e turned off by bluecore4 - external. the entire circuit must be able to enter the suspend mode. 7.7 usb detach and wake - up signal ing wt11i can provide out - of - band signa ling to a host controller by using the control lines called usb_detach and usb_wake_up. thes e are outside the usb specification (no wires exist for them inside the usb cable), but can be useful when embedding wt11i into a circuit where no external usb is visible to the user. both control lines are shared with pio pins and can be assigned to any p io pin by setting pskey_usb_pio_detach and pskey_usb_pio_wakeup to the selected pio number. usb_detach is an input which, when asserted high, causes wt11i to put usb_dn and usb_dp in high impedance state and turns off the pull - up resistor on dp. this detac hes the device from the bus and is logically equivalent to unplugging the device. when usb_detach is taken low, wt11i will connect back to usb and await enumeration by the usb host. usb_wake_up is an active high output (used only when usb_detach is active) to wake up the host and allow usb communication to recommence. it replaces the function of the software usb wake_up message (which runs over the usb cable) and cannot be sent while bluecore4 - external is effectively disconnected from the bus.
bluegiga technologies oy page 21 of 38 figure 12 : usb_detach and usb_wake_up signals 7.8 usb driver a usb bluetooth device driver is required to provide a software interface between bluecore4 - external and bluetooth software running on the host computer. please, contact support@bluegiga.com for suitable drivers. 7.9 usb v2.0 compliance and compatibility although wt11i meets the usb specification, csr cannot guarantee that an application circuit designed around the module is usb compliant. the cho ice of application circuit, component choice and pcb layout all affect usb signal quality and electrical characteristics. the information in this document is intended as a guide and should be read in association with the usb specification, with particular attention being given to chapter 7. independent usb qualification must be sought before an application is deemed usb compliant and can bear the usb logo. such qualification can be obtained from a usb plugfest or from an independent usb test house. terminal s usb_dp and usb_dn adhere to the usb specification v2.0 (chapter 7) electrical requirements. bluecore4 - external is compatible with usb v2.0 host controllers; under these circumstances the two ends agree the mutually acceptable rate of 12mbits/s according to the usb v2.0 specification.
bluegiga technologies oy page 22 of 38 8 serial peripheral interface (spi) the spi port can be used for s y stem debugging. it can also be used for programming the flash memor y and setting the pskey configurations . wt11i uses 16 - bit data and 16 - bit address serial pe ripheral interface, where transactions may occur when the internal processor is running or is stopped. spi interface is connected using the mosi, miso, csb and clk pins. please, contact support@bluegiga.com for detailed inform ation about the instruction cyc le.
bluegiga technologies oy page 23 of 38 9 pcm codec interface pcm is a standard method used to digitiz e audio (particularly voice) for transmission over digital communication channels. through its pcm interface, wt11i has hardware support for co ntinual transmission and reception of pcm data, thus reducing processor overhead for wireless headset applications. wt11i offers a bidirectional digital audio interface that routes directly into the baseband layer of the on - chip firmware. it does not pass through the hci protocol layer. hardware on wt11i allows the data to be sent to and received from a sco connection. up to three sco connections can be supported by the pcm interface at any one time. wt11i can operate as the pcm interface master generating an output clock of 128, 256 or 512khz. when configured as pcm interface slave, it can operate with an input clock up to 2048khz. wt11i is compatible with a variety of clock formats, including long frame sync, short frame sync and gci timing environments. i t supports 13 - bit or 16 - bit linear, 8 - bit - law or a - law companded sample formats at 8ksamples/s and can receive and transmit on any selection of three of the first four slots following pcm_sync. the pcm configuration options are enabled by setting pskey_p cm_config32. wt11i interfaces directly to pcm audio devices. note: analog audio lines are very sensitive to rf disturbance. use good layout practices to ensure noise less audio . make sure that the return path for the audio signals follows the forward curr ent all the way as close as possible and use fully differential signals when possible. d o not compromise audio routing. 9.1 pcm interface master/slave when configured as the master of the pcm interface, wt11i generates pcm_clk and pcm_sync. figure 13 : pcm interface master when configured as the slave of the pcm interface, wt11i accepts pcm_clk rates up to 2048khz.
bluegiga technologies oy page 24 of 38 figure 14 : pcm interface slave 9.2 long frame sync long frame sync is the name given to a clocking format that controls the transfer of pcm data words or samples. in long frame sync, the rising edge of pcm_sync indicates the start of the pcm word. when wt11i is configured as pcm master, generating pcm_sync and pcm_clk, then pcm_sync is 8 - bits long. whe n wt11i is configured as pcm slave, pcm_sync may be from two consecutive falling edges of pcm_clk to half the pcm_sync rate, i.e., 62.5s long. figure 15 : long frame sync (shown with 8 - bit companded sample) wt11i samples pcm_in on the falling edge of pcm_clk and transmits pcm_out on the rising edge. pcm_out may be configured to be high impedance on the falling edge of pcm_clk in the lsb position or on the rising edge. 9.3 short frame sync in short frame sync, the falling edge of pcm _sync indicates the start of the pcm word. pcm_sync is always one clock cycle long.
bluegiga technologies oy page 25 of 38 figure 16 : short frame sync (shown with 16 - bit sample) as with long frame sync, wt11i samples pcm_in on the falling edge of pcm_clk and transmit s pcm_out on the rising edge. pcm_out may be configured to be high impedance on the falling edge of pcm_clk in the lsb position or on the rising edge. 9.4 multi - slot operation more than one sco connection over the pcm interface is supported using multiple slo ts. up to three sco connections can be carried over any of the first four slots. figure 17 : multi - slot operation with two slots and 8 - bit companded samples 9.5 gci interface wt11i is compatible with the gci, a standard synchronous 2 b+d isdn timing interface. the two 64kbits/s b channels can be accessed when this mode is configured.
bluegiga technologies oy page 26 of 38 figure 18 : gci interface the start of frame is indicated by the rising edge of pcm_sync and runs at 8khz. with wt11i in slave mode, the frequency of pcm_clk can be up to 4.096mhz. 9.6 slots and sample f o r mats wt11i can receive and transmit on any selection of the first four slots following each sync pulse. slot durations can be either 8 or 16 clock cycles. durations of 8 clock cycle s may only be used with 8 - bit sample formats. durations of 16 clocks may be used with 8 - bit, 13 - bit or 16 - bit sample formats. wt11i supports 13 - bit linear, 16 - bit linear and 8 - bit - law or a - law sample formats. the sample rate is 8ksamples/s. the bit order may be little or big endian. when 16 - bit slots are used, the 3 or 8 unused bits in each slot may be filled with sign extension, padded with zeros or a programmable 3 - bit audio attenuation compatible with some motorola codecs.
bluegiga technologies oy page 27 of 38 figure 19 : 16 - bit slot length and sample formats 9.7 additional features wt11i has a mute facility that forces pcm_out to be 0. in master mode, pcm_sync may also be forced to 0 while keeping pcm_clk running which some codecs use to control power down. 9.8 pcm_clk a nd pcm_sync generation wt11i has two methods of generating pcm_clk and pcm_sync in master mode. the first is generating these signals by dds from bluecore4 - external internal 4mhz cl ock. using this mode limits pcm_clk to 128, 256 or 512khz and pcm_sync to 8 khz. the second is generating pcm_clk and pcm_sync by dds from an internal 48mhz clock (which allows a greater range of frequencies to be generated with low jitter but consumes more power). this second method is selected by setting bit 48m_pcm_clk_gen_en i n pskey_pcm_config32. when in this mode and with long frame sync, the length of pcm_sync can be either 8 or 16 cycles of pcm_clk, determined by long_length_sync_en in pskey_pcm_config32. the equation xxx describes pcm_clk frequency when being generated usi ng the internal 48mhz clock:
bluegiga technologies oy page 28 of 38 equation 2 : pcm_clk frequency when being generated using the internal 48mhz clock the frequency of pcm_sync relative to pcm_clk can be set using equation xxx : equation 3 : pcm_sync frequency relative to pcm_clk cnt_rate, cnt_limit and sync_limit are set using pskey_pcm_low_jitter_config. as an example, to generate pcm_clk at 512khz with pcm_sync at 8khz, set pskey_pcm_low_jitter_config to 0x08080177. 9.9 pcm configuration the pcm configuration is set using two ps keys, pskey_pcm_config32 detailed in table 12 and pskey_pcm_low_jitter_config in table 13 . the default for pskey_pcm_config32 is 0x00800000, i.e., first slot following sync is active, 13 - bit linear voice format, lo ng frame sync and interface master generating 256khz pcm_clk from 4mhz internal clock with no tri - state of pcm_out.
bluegiga technologies oy page 29 of 38 table 12 : pskey_pcm_config32 description table 13 : pskey_pcm_low_jitter_config description name bit position description - 0 set to 0 slave mode en 1 0 selects master mode with internal generation of pcm_clk and pcm_sync. 1 selects slave mode requiring externally generated pcm_clk and pcm_sync. this should be set to 1 if 48m_pcm_clk_gen_en (bit 11) is set. short sync en 2 0 selects long frame sync (rising edge indicates start of frame), 1 selects short frame sync (falling edge indicates start of frame). - 3 set to 0 sign extended en 4 0 selects padding of 8 or 13-bit voice sample into a 16- bit slot by inserting extra lsbs, 1 selects sign extension. when padding is selected with 3-bit voice sample, the 3 padding bits are the audio gain setting; with 8-bit samples the 8 padding bits are zeroes. lsb first en 5 0 transmits and receives voice samples msb first, 1 uses lsb first. tx tristate en 6 0 drives pcm_out continuously, 1 tri-states pcm_out immediately after the falling edge of pcm_clk in the last bit of an active slot, assuming the next slot is not active. tx tristate rising edge en 7 0 tristates pcm_out immediately after the falling edge of pcm_clk in the last bit of an active slot, assuming the next slot is also not active. 1 tristates pcm_out after the rising edge of pcm_clk. sync suppress en 8 0 enables pcm_sync output when master, 1 suppresses pcm_sync whilst keeping pcm_clk running. some codecs utilize this to enter a low power state. gci mode en 9 1 enables gci mode. mute en 10 1 forces pcm_out to 0. 48m pcm clk gen en 11 0 sets pcm_clk and pcm_sync generation via dds from internal 4 mhz clock, as for bluecore4-external. 1 sets pcm_clk and pcm_sync generation via dds from internal 48 mhz clock. long length sync en 12 0 sets pcm_sync length to 8 pcm_clk cycles and 1 sets length to 16 pcm_clk cycles. only applies for long frame sync and with 48m_pcm_clk_gen_en set to 1. - [20:16] set to 0b00000. master clk rate [22:21] selects 128 (0b01), 256 (0b00), 512 (0b10) khz pcm_clk frequency when master and 48m_pcm_clk_gen_en (bit 11) is low. active slot [26:23] default is 0001. ignored by firmaware sample_format [28:27] selects between 13 (0b00), 16 (0b01), 8 (0b10) bit sample with 16 cycle slot duration 8 (0b11) bit sample 8 cycle slot duration. name bit position description cnt limit [12:0] sets pcm_clk counter limit cnt rate [23:16] sets pcm_clk count rate. sync limit [31:24] sets pcm_sync division relative to pcm_clk.
bluegiga technologies oy page 30 of 38 10 i/o parallel ports six lines of programmable bidirectional input/output s (i/o) are provided. all the pio lines are power from vdd. pio lines can be configured through software to have either weak or s trong pull - ups or pull - downs. all pio lines are configured as inputs with weak pull - downs at reset. any of the pio lines can be configured as interrupt request lines or as wake - up lines from sleep modes. wt11i ha s a general purpose analogue interface pin a io[1] . this is used to access internal circuitry and control signals. it may be configured to provide additional functionality. auxilia ry functions available via aio[1] include an 8 - bit adc and an 8 - bit dac. typically the adc is used for battery voltage me asurem ent. signals selectable at this pin include the band gap reference voltage and a variety of clock signals: 48, 24, 16, 8mhz and the xtal clock frequency. when used with analogue signals, the voltage range is constrained by the analogue supply voltage internally to the module (1.8v). when configured to drive out digital level signals (e.g., clocks), the output voltage level is determined by vdd. 10.1 pio defaults bluegiga cannot guarantee that these terminal functions remain the same. refer to the software release note for the implementation of these pio lines, as they are firmware build - specific.
bluegiga technologies oy page 31 of 38 11 reset wt11i may be re set from several sources: reset pin, power on reset, a uart break character or via software configured watchdog timer. the reset pin is an ac tive low reset and is internally filtered using the internal low frequency clock oscillator. a reset will be performed between 1.5 and 4.0ms following resetb being activ e. it is recommended that reset be applied for a period greater than 5ms. the power on reset occurs when the vdd_core supply internally to the module falls below typically 1.5v and is released when vdd_core rises above typically 1.6v. at reset the digital i/o pins are set to inputs for bidirectional pins and outputs are tri - state. 11.1 pin state s on reset table 14 : pin states on reset pin name state pio[7:2] input with weak pull-down pcm_out tri-staed with weak pull-down pcm_in input with weak pull-down pcm_sync input with weak pull-down pcm_clk input with weak pull-down uart_tx output tristated with weak pull-up uart_rx input with weak pull-down uart_rts output tristated with weak pull-up uart_cts input with weak pull-down usb+ input with weak pull-down usb- input with weak pull-down spi_csb input with weak pull-down spi_clk input with weak pull-down spi_mosi input with weak pull-down spi_miso output tristated with weak pull-down aio[1] output, driving low
bluegiga technologies oy page 32 of 38 12 certifications wt11i - e is compliant to the following specifications. at the time of writing this version the official approval for these specification s is still in the process. immediately when bluegiga has received the approval this discla i mer is removed and the new version of this document is published. 12.1 bluetooth wt11i - e module is bluetooth qualified a nd listed as a controller subsystem and it is bluetooth com pliant to the following profiles of the core spec version 2.1/2.1+edr . ? baseband ? hci ? link manager ? radio 12.2 fcc and ic this device complies with part 15 of the fcc rules. operation is subject to the following two co nditions: (1) this device may not cause h armful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. fcc rf radiation exposure statement: this equipment complies with fcc radiation exposure limits set forth for an u ncontrolled environment. end users must follow the specific operating instructions for satisfying rf exposure compliance. this transmitter must not be co - located or operating in conjunction with any other antenna or transmitter. this transmitter is conside red as mobile device and should not be used closer than 20 cm from a human body. to allow portable use in a known host class 2 permissive change is required. please contact support@bluegiga.com for detailed info rmation. ic statements : this device complies with industry canada licence - exempt rss standard(s). operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, includ ing interference that may cause undesired operation of the device. under industry canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by industry canada. to reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
bluegiga technologies oy page 33 of 38 oem responsibilities to comply with fcc and industry canada regulations the wt11i - e m odule has been certified for integration into products only by oem integrators under the following conditions: ? the antenna(s) must be installed such that a minimum separation distance of 20cm is maintained between the radiator (antenna) and all persons at all times. ? the transmitter module must not be co - located or operating in conjunction with any other antenna or transmitter. as long as the two conditions above are met, further transmitter testing will not be required. however, the oem integrator is still responsible for testing their end - product for any additional compliance requirements required with this module installed (for example, digital device emissions, pc peripheral requirements, etc.). importan t note: in the event that these conditions cannot be met (for certain configurations or co - location with another transmitter), then the fcc and industry canada authorizations are no longer considered valid and the fcc id and ic certification number cannot be used on the final product. in these circumstances, the oem integrator will be responsible for re - evaluating the end product (including the transmitter) and either obtaining a separate fcc and industry canada authorization or ask for bluegiga to make a class 2 permissive change to the listing of the module . with a class 2 permissive change the oem integrator can still use the fcc id and ic certification number of the module in the final product and the responsibility of compliance remains at bluegiga. end product labeling the wt11i - e module is labeled with its own fcc id and ic certification number. if the fcc id and ic certification number are not visible when the module is installed inside another device, then the outside of the device into which th e module is installed must also display a label referring to the enclosed module. in that case, the final end product must be labeled in a visible area with the following: contains transmitter module fcc id: qoqwt 11i contains transmitter module ic: 5 123a - bgtwt 11i or contains fcc id: qoqwt1 1 i contains ic: 5123a - bgtwt 11i the oem of the wt11i - e m odule must only use the approved antenna. the oem integrator has to be aware not to provide information to the end user regarding how to install or remov e this rf module or change rf related parameters in the user manual of the end product. to comply with fcc and industry canada rf radiation exposure limits for general population, the antenna(s) used for this transmitter must be installed such that a mini mum separation distance of 20cm is maintained between the radiator (antenna) and all persons at all times and must not be co - located or operating in conjunction with any other antenna or transmitter.
bluegiga technologies oy page 34 of 38 12.2.1 fcc et ic cet appareil est conforme lalina 15 des r gles de la fcc. deux conditions sont respecter lors de son utilisation : (1) cet appareil ne doit pas crer dinterfrence susceptible de causer un quelconque dommage et, (2) cet appareil doit accepter toute interfrence, quelle quelle soit, y compris les inte rfrences susceptibles dentra?ner un fonctionnement non requis. dclaration de conformit fcc dexposition aux radiofrquences (rf): ce matriel respecte les limites dexposition aux radiofrquences fixes par la fcc dans un environnement non contr?l. l es utilisateurs finaux doivent se conformer aux instructions dutilisation spcifies afin de satisfaire aux normes dexposition en matire de radiofrquence. ce transmetteur ne doit pas tre install ni utilis en concomitance avec une autre antenne ou un autre transmetteur. ce transmetteur est assimil un appareil mobile et ne doit pas tre utilis moins de 20 cm du corps humain. afin de permettre un usage mobile dans le cadre dun matriel de catgorie 2, il est ncessaire de procder quelques adap tations. pour des informations dtailles, veuillez contacter le support technique bluegiga : support@bluegiga.com . dclaration de conformit ic : ce matriel respecte les standards rss exempt de licence dindu strie canada. son utilisation est soumise aux deux conditions suivantes : (1) lappareil ne doit causer aucune interfrence, et (2) lappareil doit accepter toute interfrence, quelle quelle soit, y compris les interfrences susceptibles dentra?ner un fonctionne ment non requis de lappareil. selon la rglementation dindustrie canada, ce radio - transmetteur ne peut utiliser quun seul type dantenne et ne doit pas dpasser la limite de gain autorise par industrie canada pour les transmetteurs. afin de rduire les interfrences potentielles avec dautres utilisateurs, le type dantenne et son gain devront tre dfinis de telle fa?on que la puissance isotrope rayonnante quivalente (eirp) soit juste suffisante pour permettre une bonne communication. les responsabil its de lintgrateur afin de satisfaire aux rglementations de la fcc et dindustrie canada : les modules wt11i ont t certifis pour entrer dans la fabrication de produits exclusivement raliss par des intgrateurs dans les conditions suivantes :
bluegiga technologies oy page 35 of 38 ? lant enne (ou les antennes) doit tre installe de fa?on maintenir tout instant une distance minimum de 20cm entre la source de radiation (lantenne) et toute personne physique. ? le module transmetteur ne doit pas tre install ou utilis en concomitance ave c une autre antenne ou un autre transmetteur. tant que ces deux conditions sont runies, il nest pas ncessaire de procder des tests supplmentaires sur le transmetteur. cependant, lintgrateur est responsable des tests effectus sur le produit final afin de se mettre en conformit avec dventuelles exigences complmentaires lorsque le module est install (exemple : missions provenant dappareils numriques, exigences vis - - vis de priphriques informatiques, etc.) ; important : dans le cas o ces c onditions ne peuvent tre satisfaites (pour certaines configurations ou installation avec un autre transmetteur), les autorisations fournies par la fcc et industrie canada ne sont plus valables et les numros didentification de la fcc et de certification dindustrie canada ne peuvent servir pour le produit final. dans ces circonstances, il incombera lintgrateur de faire rvaluer le produit final (comprenant le transmetteur) et dobtenir une autorisation spare de la part de la fcc et dindustrie cana da. etiquetage du produit final chaque module wt11i possde sa propre identification fcc et son propre numro de certification ic. si lidentification fcc et le numro de certification ic ne sont pas visibles lorsquun module est install lintrieur du n autre appareil, alors lappareil en question devra lui aussi prsenter une tiquette faisant rfrence au module inclus. dans ce cas, le produit final doit comporter une tiquette place de fa?on visible affichant les mentions suivantes : ? contient un module transmetteur certifi fcc qoq wt11i ? ? contient un module transmetteur certifi ic 5123a - bgt wt11i ? ou ? inclut la certification fcc qoq wt11i ? ? inclut la certification ic 5123a - bgt wt11i ? lintgrateur du module wt11i ne doit utiliser que les ant ennes rpertories dans le tableau 21 certifies pour ce module. lintgrateur est tenu de ne fournir aucune information lutilisateur final autorisant ce dernier installer ou retirer le module rf, ou bien changer les paramtres rf du module, dans le manuel dutilisation du produit final.
bluegiga technologies oy page 36 of 38 afin de se conformer aux limites de radiation imposes par la fcc et industry canada, lantenne (ou les antennes) utilise pour ce transmetteur doit tre installe de telle sorte maintenir une distance minimum de 2 0cm tout instant entre la source de radiation (lantenne) et les personnes physiques. en outre, cette antenne ne devra en aucun cas tre installe ou utilise en concomitance avec une autre antenne ou un autre transmetteur. 12.3 ce wt11i meets the requiremen ts of the standards below and hence fulfills the requirements of emc directive 89/336/eec as amended by directives 92/31/eec and 93/68/eec within ce marking requirement. ? emc (immunity only) en 301 489 - 17 v.1.3.3 in accordance with en 301 489 - 1 v1.8.1 ? radia ted emissions en 300 328 v1.7.1 ? safety en60950 - 1:2006+a11:2009+a1:2010+a12:2011 12.4 qualified antenna types for wt11i - e this device has been designed to opera te with a standard 2.14 db i dipole antenna . any antenna of a different type or with a gain higher tha n 2.14 dbi is strictly prohibited for use with this device. using an antenna of a different type or gain more than 2.14 dbi will require addit ional certifications . please, contact support@bluegiga.com for more i nformation. th e required antenna impedance is 50 ohms. table 15 : qualified antenna types for wt41 - e to reduce potential radio interference to other users, the antenna type and its gain should be so chose n that the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful communication. any standard 2.14 dbi dipole antenna can be used without an additio nal application to fcc. table 16 lists approved antennas for wt 11i - e. any app roved antenna listed in table 16 can be used directly with wt11i - e without any additional approval . any antenna not listed in table 20 can be used with wt11i - e as long as detailed information from that particular antenna is provided to bluegi ga for approval. specification of each antenna used with wt11i - e will be filed by bluegiga as a class 1 permissive change. please, contact support@bluegiga.com for more information. antenna type maximum gain dipole 2.14 dbi qualified antenna types for WT11I-E
bluegiga technologies oy page 37 of 38 item manufacturer ma nufacturers part number measure d gain (dbi) specifie d gain (dbi) measure total efficiency (%) 1 pulse w1030 1 2 dbi 70 - 80 2 linx technologies inc ant - 2.4 - cw - ct - sma 1.3 2 dbi 77 3 ead ea - 79a 0.4 2 dbi 60 4 antenova b4844/b6090 1.4 2 dbi 76 - 82 5 lit econ car - atr - 187 - 001 0.8 2 dbi 60 - 70 table 16 : approved antennas for wt1 1 i - e
bluegiga technologies oy page 38 of 38 13 contact information sales: sales@bluegiga.com technical support: support@bluegiga.com http://techforum.bluegiga.com orders : orders@bluegiga.com www: www.bluegiga.com www.bluegiga.hk head office / finland: phone: +358 - 9 - 4355 060 fax: +358 - 9 - 4355 0660 sinikalliontie 5a 02630 espoo finland postal address / finland : p.o. box 120 02631 espoo finland sales office / usa: phone: +1 770 291 2181 fax : +1 770 291 2183 bluegiga technologies, inc. 3235 satellite boulevard, building 400, suite 300 duluth, ga, 30096, usa sales office / hong - kong : phone: +852 3182 7321 fax: +852 3972 5777 bluegiga technologies, inc. 19/f silver fortune plaza, 1 wellington street, central hong kong
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