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yamaha corporation YSS915 catalogue no:lsi - 4ss915a0 1999.03 YSS915 karaoke processor 2 for video disc player (kp2v2) introduction YSS915 (kp2v2) is an lsi for processing karaoke voice signals. this lsi has an a/d converter (1 channel) for the microphone echo, and a memory for the microphone echo and key control. these features allow achieving the functions needed for the karaoke system by using only one lsi chip. as for the microphone echoes, many other types of echoes are available in addition to ordinary ones so that YSS915 is applicable to various uses. in addition to these karaoke programs, YSS915 is able to provide the movie & music programs, with which the surround effect is applied to the movie and music sources for giving the users more enjoyment. YSS915 is pin compatible with and register compatible with yss903 (kp2v). features [ [ [ [ f f f fun un un und d d da a a am m m me e e en n n nt t t ta a a al l l l f f f fun un un unc c c ct t t ti i i io o o on n n ns s s s ] ] ] ] 1), karaoke program key control (control by 50 cents in +/- 600 cent range, +/- one octave, etc.) voice cancel microphone echo normal microphone echo (174 msec or less (fs = 44.1 khz)) stereo-echo/ reverb-echo microphone key control (+/- 10 cents, +/- 20 cents, +/- 400 cents, +/- 700 cents and +/- 1 octave) microphone "ymersion?" tone control bass, mid-tone, treble (0 to +/- 10 db at 2 db steps) surround "ymersion?" (yamaha's original wide surround technology) 2), movie and music program surround initial reflection sound synthesizing system yamaha "ymersion?" tone control bass, mid-tone, treble (0 to +/- 10 db at 2 db steps) [ [ [ [ i i i i/o /o /o /o i i i in n n nt t t te e e er r r rf f f fa a a ac c c ce e e e ] ] ] ] digital signal inputs : 2 channels (16/18/20/24 bits) digital signal outputs : 2 channels (16/18/20/24 bits) analog signal input : 1 channel ( for the microphone ) microprocessor interface : serial four line system through mode : digital input is outputted without any processing (correspond with fs = 96 khz 24 bit dvd format) [ [ [ [ o o o ot t t th h h he e e er r r rs s s s ] ] ] ] pin/register upper compatible with yss903 (kp2v) sampling frequency : 32, 37.8, 44.1, 48 khz or correspond with 96 khz through mode. package : 28 pin sop ( YSS915-m )
YSS915 2 difference between yss903 and yss905 1. no built-in dac. (refer to the process flow chart in operations.) 2. connectable directly with msb justified data output adc. (refer to format 4 of 4. digital audio interface in functions.) 3. microphone interface terminals cdi and cdo can be connected on the board. this feature allows to reduce the number of ports by one. (refer to 5. microcomputer interface in functions.) 4. input fader has been added for the microphone echo. this feature allows to apply fade-in/fade-out control to the microphone echo through designation with one bit from the microcomputer. (refer to 1. karaoke program in operations, and 3) vcr ($02) of 1. functions in registers.) 5. zero level detection function has been added for digital audio output. YSS915 outputs 0 at the pin zero when an audio input has been zero for a certain period. this signal can be used to improve s/n ratio by muting the output of external dac. (refer to 6. others in functions.) 6. an output port po has been added for controlling peripheral devices. the port po can be used, as an example, to control the gain of audio output amplifier through this lsi from the microcomputer. (refer to 6. others in functions.) 7. a mode with extended band width for microphone echo has been newly added. two types of cut-off frequency have been added for the low pass filter. (refer to 7) rvr ($06) and 11) mdr ($1c) of 1. functions in registers.) 8. internal dsp has been given the operation accuracy of 20 bits.
YSS915 3 pin configuration < 28 p in sop to p view > / ic / cs cdi / sck sdsy di bci do l/r aol vref avss avdd xi aor dvdd2 dvss2 bco depi dvss1 dvdd1 adc1 adc2 micin cdo pllc p0 1 2 3 4 5 6 7 8 9 10 11 14 12 13 xisel/zero 28 27 26 25 24 23 22 21 20 19 18 17 16 15
YSS915 4 pin function notes ; + : pull up, a : analog terminal no. name i/o (see note1) function 1di i+ digital audio input serial data 2 bci i+ digital audio input bit clock 3do o+ digital audio output serial data 4l/r o digital audio output word clock 5 dvdd1 - power supply, +5 v (for digital system) 6 bco o digital audio output bit clock 7 dvss1 - ground (for digital system) 8 avdd -a power supply, +5 v (for analog system) 9 pllc -a connecting resistor and capacitor for pll 10 avss -a ground (for analog system) 11 adc1 -a connecting capacitor for adc 12 adc2 -a connecting capacitor for adc 13 vref oa referential voltage output 14 micin ia analog input, analog voice signal for microphone channel 15 aol oa outputs analog voice signal for l channel 16 aor oa outputs analog voice signal for r channel 17 xi i external clock input 18 /ic i initial clear (low active) 19 dvdd2 - power supply, +5 v (for digital system) 20 depi i de-emphasis control (h : on, l : off) 21 dvss2 - ground (for digital system) 22 xisel/zero i+/o switches master clock rate/zero output 23 p0 i+/o test input terminal /p0 output 24 /cs i microcomputer interface input chip select 25 /sck i microcomputer interface input serial clock 26 cdi i microcomputer interface input serial data 27 cdo o+ microcomputer interface output serial data 28 sdsy i+ digital audio input word clock
YSS915 5 block diagram this lsi has two input channels (l and r) and two output channels (l and r) for digital audio interface. it also has a one bit delta-sigma type ad converter 1 channel (microphone) that performs delta-sigma modulation at its analog block, and decimation/interpolation of 128 times at its dsp. karaoke audio signal is processed by dsp for processing karaoke audio signal and ram for delay. for the details of karaoke audio signal processing, please refer to "operations". the parameters of this lsi are set through cpu interface. for the details of the parameters, please refer to "registers". modes name of mode code description kp2 standard mode n the functions of kp2 (yss216b) can be used. the registers are compatible, except that the coefficient registers (addresses $27 and $30 to $33) of kp2 that controls the analog audio input and analog microphone echo output cannot be used because yss903 does not have these ports. kp2v extended mode e every function of this device can be used. analog block dsp for delay ram digital i/o interface cpu interface clock generator program rom depi cdi / sck sdsy,di,bci do,l/r,bco aol aor xi xisel vref /ic cdo p0 adc1 micin pllc adc2 zero kp2v2 /cs
YSS915 6 functions 1. clock signal xi, xisel, pllc operation of this lsi requires input of clock with frequency of 384 fs (fs : sampling frequency) or 256 fs to the xi terminal. keep the xisel terminal open when using with the 384 fs clock.(xisel pin is pulled up internally.) pull down xisel terminal to the digital ground through 4.7 k ohm resistor when using with the 256 fs clock. the sampling frequency can be selected in the range from 32 khz to 48 khz. the sampling frequency is specified with opr register ($00).(the sampling frequency of fs = 32 or 48 khz can be specified only kp2v extended mode.) in addition, the thing that input 37mhz in xi by a maximum is possible in only through-mode. connect a resistor and capacitor to pllc terminal as shown below for adjustment of pll in the lsi. 2. initial clear /ic this lsi requires initial clear at power on. the initial clear is performed by inputting "l" to /ic terminal. note ; n = kp2 standard mode e = kp2v extended mode sampling xi input frequency av ailable mode frequency (fs) 384fs 256fs (see note.) 32.0 khz 12.288 mhz 8.192 mhz e 37.8 khz 14.5152 mhz 9.6768 mhz n,e 44.1 khz 16.9344 mhz 11.2896 mhz n,e 48.0 khz 18.432 mhz 12.288 mhz e / ic 2msec min pllc kp2 v 2
YSS915 7 3. analog audio interface micin, adc1, adc2, aol, aor, vref this lsi has a one channel (mic input) of delta-sigma type a/d converter, thus requiring the external circuits as described below. the output of aol and aor can be used as a direct signal from the microphone because the volume of the signal is controlled as analog signal which is outputted from aol and aor. mic micin adc1 adc2 vre f ao l aor av s s avdd kp2v2 ao l aor analog input section analog output section other section ti
YSS915 8 4. digital audio interface sdsy, bci,di, l/r,do,bco - 1) digital audio signal is inputted through bci, sdsy and di pins using the following format. - 2) digital audio signal is outputted through bco, l/r, and do pins using the following format. - 3) the digital audio interface is made compatible with the following format with opr register ($00) and dar register ($04). n=kp2 standard mode e=kp2v extended mode format1 use this format when digital audio input is not used. format2 use this format when digital audio input is used. bci is able to accept any frequency between including 96fs from 32fs, while bco outputs only 64 fs. bci, sdsy and di signals must be synchronized with xi clock. format3 use this format when digital audio input is used. bci input signal is passed to the bco output, being inverted. sdsy input signal is passed to the l/r output, being delayed by 2.5 clocks of bci. bci, sdsy and di signals must be synchronized with xi clock. format bci bco opr [5] dar [3:2] mdr [3] available mode format1 - 64fs 1 * 0 n,e format2 32-96fs 64fs 0 0 0 n,e 64fs 0 1 format3 48fs bci 0 2 0 e 03 format4 - 64fs 0 * 1 e bci sdsy 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 di(16bit) di(18bit) di(20bit) di(24bit) lch rch 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 16 17 18 19 16 17 16 17 18 19 20 21 22 23 16 17 18 19 16 17 0 bco l/r 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 do(16bit) do(18bit) do(20bit) do(24bit) lch rch 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 16 17 18 19 16 17 16 17 18 19 20 21 22 23 16 17 18 19 16 17 0
YSS915 9 format4 this format is used to interface with the a/d converter which outputs data msb justified. connect bco pin of this lsi to the bit clock input pin of the a/d converter, l/r pin to lr clock input pin of the converter, and di pin to data output pin of the converter. bco outputs 64 fs without regarding to the value of dat[3:2]. keep the pins bci and sdsy open. the format 4 is as described below. - 4) length of data word of the digital audio signal can be set by the dar register ($04) to 16, 18, 20 or 24 bits (only in kp2v extended mode). when the data word is 24 bit long, only upper 20 bits are used for processing internal signal. note ; in kp2 standard mode, both of the input and output word lengths are only 16 bits. - 5) the thru-mode can be selected by using dar register ($04) (only in kp2v extended mode). in the thru-mode ; bci input signal is passed to the bco output, being inverted. sdsy input signal is passed to the l/r output, being delayed by 2.5 clocks of bci. di input signal is passed to the do output, being delayed by 2.5 clocks of bci. when the sampling frequency is in the range from 64 khz to 96 khz, the input signal can be passed through this lsi without deteriorating, for example, the 24 bit data accuracy at the sampling frequency of 96 khz. the through-mode is enabled when the value of dar[bit3:2] is 01, 10 or 11. length of inputted word dar [5:4] length of outputted word dar [1:0] 16bit 0 16bit 0 18bit 1 18bit 1 20bit 2 20bit 2 24bit 3 24bit 3 bco l/r 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 do(16bit) do(18bit) do(20bit) do(24bit) lch rch di msb lsb msb lsb 01 31 0 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 16 17 18 19 16 17 16 17 18 19 20 21 22 23 16 17 18 19 16 17
YSS915 10 5. microcomputer interface /cs, /sck, cdi, cdo, depi these are 8 bit serial interface for writing data into or reading data from internal registers of this device. do not write or read data into or from this device in 200 msec from the initial clear moment (rise moment of /ic). - 1) writing data set the address of an internal register into the first byte, and data into the second byte. use the following format. - 2) reading data (only in kp2v extended mode) for reading data, only mlr register ($10) is provided. use the following format. - 3) depi when depi is "h", de-emphasis is enabled regardless of the state of internal register. when depi is "l", setting of opr register ($00) is valid. 6. others p0 ,zero - 1) p0 p0 pin outputs the value of the register phc[0]($08). this value is outputted when opr($01) has been set after the initial clear. this pin is in hz state until opr($01) is set. this function is valid when mdr[0]($1c) is h. when mdr[0]($1c) is l, this pin always outputs l like yss903 does. - 2) zero when both of the digital audio outputs, l and r, have been zero(0) for the period equivalent to 511 samplings, the zero level detection function activates to make zero pin output l . in other period, this pin is in h state. this value is outputted when opr($01) has been set after the initial clear. this pin is in hz state until opr($01) is set. this function is valid when mdr[1]($1c) is h. when mdr[1]($1c) is l, this pin always outputs l like yss903 does.
operations process flow chart 1. karaoke program flow of signal in processing karaoke audio signal in this lsi is as described by the following diagram. the karaoke program can be used in both kp2 standard mode or kp2v extended mode. in kp2 standard mode, the same functions as those of kp2 can be used, and most of the registers of kp2v and kp2 are compatible with each other, except that the registers related to analog audio input and analog microphone echo output cannot be used because kp2v does not have these functions. in kp2v extended mode, every function of the karaoke program can be used. mono-echo, stereophonic echo, 3 d echo and super 3d echo provided in the evaluation board can be obtained by combining the following microphone echo/reverb echo, microphone key control and/or microphone ymersion functions appropriately. 11
2. movie and music program flow of signal in processing movie and music audio signal in this lsi is as follows the movie or music program can be used in kp2v extended mode the fifteen types of the surround mode provided in the evaluation board are obtained by combining the following tone control, initial reflection sound and/or ymersion functions appropriately. 12
operations of functions 1. karaoke program functions for processing the karaoke audio signals are described here. function description control register coefficient register controllable mode de-emphasis de-emphasizes audio input signal that has been emphasized. specifies a sampling frequency and on/off of de-emphasis. opr[1] opr[7:6] n,e input fader controls fade-in/out for audio input signal. specifies fade-in/out for each channel after setting fade time (see note.) vcr[1:0] tmr[7:0] n,e voice cancel reduces mid-range signal of inputted audio signal that is located in the center of the sound field such vocal signal generated by stereophonic cd. specifies voice cancel on/off after setting sampling frequency and fade time. (see note.) vcr[4] tmr[7:0] opr[7:6] n,e key control changes key of inputted audio signal, and controls key shift for audio input signal. the amount of key shift must be specified. ksr[4:0] n,e tone control controls tone of inputted audio signal in three frequency bands. specifies the levels for bass (fc = 200 hz), treble (fc = 5 khz), and mid-tone (fc = 1 khz) after selecting a sampling frequency. tcr[7:0] rvr[3:0] opr[7:6] e surround applies y mersion surround to audio input signal. one of four types of surround modes is selected and output levels for r and l channels are set individually based on the selected surround mode. ksr[6:5] c01,c04 n,e microphone level detection detects and reads the level of signal input from microphone. specifies the time constant for level detection. mlr[7:0] c14 e microphone echo applies echo to signal from microphone processed by setting delay and feedback. specifies delay time, feedback level and output signal level for l/r. c05,c08,c0b,c0c c16,c17,c00,c03 n,e stereo echo expands echo by providing stereophonic output. c1a,c1b e reverberation echo damps echo naturally by adding reverb function. rvr[4] e microphone key control applies microphone echo by subjecting signal inputted from microphone to key shift. specifies the amount of key shift and output signal level for l/r. ker[7:0] c18,c19 e microphone y mersion applies ymersion to microphone echo to obtain expansion that is specific to ymersion. specifies output signal level for l/r. c1c,c1d e soft mute noiseless mute, specifies on/off. opr[3] n,e volume controls volume. some of the functions can be set in either of kp2 standard mode or kp2v extended mode, some only in kp2v extended mode. c02,c06,c09,c0a c0d,c0e,c0f,c15 c1e,c1f n,e note ; the fade time is applicable to the input fader and voice cancel functions. 13
2. movie and music program functions for processing the movie and music signals are described here. the movie and music program can be used in kp2v extended mode. this lsi presents the features of sound field by using a combination of tone control, surround (initial reflected sound)and sur round(y mersion). the tone control determines frequency characteristics of the sound field. initial reflected sound synthesis determines extent and depth of sound field to characterize a surround environment(concert hal l and stadium). y mersion surround determines size and extent of reverberation. function description control register coefficient register de-emphasis de-emphasizes audio input signal that has been emphasized. specifies a sampling frequency and on/off of de-emphasis. opr[1] opr[7:6] tone control controls tone of inputted audio signal in three frequency bands. specifies the levels for bass (fc = 200 hz), treble (fc = 5 khz), and mid-tone (fc = 1 khz) after selecting a sampling frequency. tcr[7:0] rvr[3:0] opr[7:6] surround 1 (initial reflected sound) applies surround that uses initial reflected sound synthesizing system to audio input signal. one of four types of surround modes is selected and output levels for r and l channels are set individually based on the selected surround mode. ksr[6:5] c10,c11,c12 c13,c18,c19 surround 2 (y mersion) applies y mersion surround to audio input signal. one of two types of surround modes is selected and output levels for r and l channels are set individually based on the selected surround mode. ksr[7] c1a,c1b,c1c c1d,c01,c04 soft mute noiseless mute, specifies on/off. opr[3] volume controls volume. c02,c06,c09,c0a, c0e,c0f,c15,c16 c17,c1e,c1f 14
YSS915 15 registers this lsi is controlled by setting data into the registers. the address, name and function of each register is outlined as follows. controllable and uncontrollable registers (bits) vary according to the following modes. the mode is specified as follows according to the status of bit 7 of mdr register($1c). address name function $00 opr controls internal operations. $01 ksr controls key and surround. $02 vcr controls input fader and voice cancel. $03 tmr controls fade time for input fader and voice cancel. $04 dar controls digital audio i/o format. $05 tcr controls tone (bass, treble). $06 rvr controls tone (mid-range) and reverb-echo. $07 ker controls key for microphone. $08 phc port output register. $10 mlr reads microphone level. $1c mdr switching kp2 standard/kp2v extension mode, and others. $20 $3f c00 c1f coefficient register (controls volume and delay.) code mode mdr($1c)[bit 6] n kp2 standard mode 0 e kp2v extended mode 1
YSS915 16 1. functions functions, default value and controllable mode are as shown below. the default value is the value that is set at initial clear or the one obtained in other than the controllable mode. - 1) opr($00): control of internal operation bit function default controllable mode 0 unused (set "1" here.) 1- 1 controlling de-emphasis "1" = de-emphasis is disabled. "0" = de-emphasis is enabled. note ; whenever depi is "h", de-emphasis is enable regardless of the status of this bit. 1n,e 2 unused (set "0" here.) 1- 3 controlling soft mute "1" = soft mute is off (fade-in at (1024/fs (sec)) "0" = soft mute is on (fade-out at (1024/fs (sec)) note ; fs = sampling frequency (hz) 1n,e 4 controlling internal accumulator output clear on/off "1" = internal accumulator output clear is on. "0" = internal accumulator output clear is off (normal operation). 1n,e 5 controlling sync mode "1" = internal synchronization mode (digital audio input signals (bci, sdsy and di) are not used.) "0" = external synchronization mode (digital audio input signals (bci, sdsy and di) are used.) 1n,e 6 selecting sampling frequency b7 b6? "0 0 " =37.8khz "0 1 " =44.1khz 1n,e 7 "1 0 " =32.0khz "1 1 " =48.0khz note ; the frequencies 32.0 khz and 48.0 khz are valid in kp2v extension mode. 0e
YSS915 17 - 2) ksr($01) : control of key and surround correspondence between the setting value for key control and the amount of key shift for audio signal correspondence between the surround type and surround selection bit note ; hall0 ? concert hall that provides standard reverberation hall1 ? concert hall that provides long reverberation bit function default controllable mode 0 0 1 amount of key shift for audio signal key control 0 2 (this function is valid on karaoke program. for the correspondence between 0n,e 3 the setting value for key control and the amount of key shift, refer to the table 0 4 below.) 0 5 selecting a type of surround (y mersion) for karaoke program, or a type of surround (initial reflected sound) for movie or music program. 0 6 (for the correspondence between the setting value and the surround type, 0n,e refer to the table below. ) 7 selecting a surround mode for y mersion (valid in movie and music mode) "0" = mode0 "1" = mode1 0e ksr bit 4-0 amount of key shift bit 4-0 amount of key shift 0f 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 9-1/2 keys up 1 octave up 3-1/2 keys up 3 keys up 2-3/4 keys up 2-2/4 keys up 2-1/4 keys up 2 keys up 1-3/4 keys up 1-2/4 keys up 1-1/4 keys up 1 key up 3/4 key up 2/4 key up 1/4 key up no key shift 1f 1e 1d 1c 1b 1a 19 18 17 16 15 14 13 12 11 10 1/4 key down 2/4 key down 3/4 key down 1 key down 1-1/4 keys down 1-2/4 keys down 1-3/4 keys down 2 keys down 2-1/4 keys down 2-2/4 keys down 2-3/4 keys down 3 keys down 3-1/2 keys down 1 octave down 7 keys down 9-1/2 keys down ksr bit 6 5 surround for karaoke program (y mersion) surround for movie and music program (initial reflected sound) 0 0 0 1 1 0 1 1 pseudo-stereophonic sound live movie karaoke hall0 (see note.) hall1 (see note.) stadium rock concert
YSS915 18 1- 3) vcr($02) : control of input fader and voice cancel (valid for karaoke program) 1- 4) tmr($03) : control of fade time for input fader and voice cancel (valid for karaoke program) bit function default controllable mode 0 controlling fade-in/out at digital audio input l channel ? 1 ? = starting fade in ? 0 ? = starting fade out note ; before this bit is set, set fade time into tmr ($03). 0n,e 1 controlling fade-in/out at digital audio input r channel ? 1 ? = starting fade in ? 0 ? = starting fade out note ; before this bit is set, set fade time into tmr ($03) 0n,e 2 unused (set "0" here.) 0- 3 unused (set "0" here.) 0- 4 controlling voice cancel on/off ? 1 ? = on (switching from thru-path to voice-canceled path) ? 0 ? = off (switching from voice-canceled path to thru-path) note ; before this bit is set, set cross fade time into tmr ($03). 0n,e 5 fade-in/fade-out for microphone echo input ? 0 ? = starting fade in ? 1 ? = starting fade out note ; fade time = 1024/fs(sec) 0e 6 unused (set "0" here.) 0- 7 unused (set "0" here.) 0- bit function default controllable mode 0 0 1 fade time for input fader and voice cancel 0 2 0 3 fade time = 1024/fs(sec) when tmr=00h 0 4 0n,e 5 1048576/fs/tmr(sec) when tmr=other than 00h 0 6 0 7 note ; fs = sampling frequency 0
YSS915 19 - 5) dar($04) : control of digital audio i/o format bit function default controllable mode 0 selecting digital audio output data word length ?b1 b0? ? 0 0 ? = 16 bits 0 1 ? 0 1 ? = 18 bits ? 1 0 ? = 20 bits ? 1 1 ? = 24 bits 0 e 2 this function is valid when bit 5 of opr($00) = 0. when this bit = 1, the digital audio output synchronizes with internal clock (64 fs). ?b3 b2? 0 3 ? 0 0 ? = synchronizing with internal clock (64 fs) ? 0 1 ? = synchronizing with bci (64 fs) ? 1 0 ? = synchronizing with bci (48 fs) ? 1 1 ? = synchronizing with bci (32 fs) 0 e 4 selecting digital audio input data word length ?b5 b4? ? 0 0 ? = 16bit 0 5 ? 0 1 ? = 18bit ? 1 0 ? = 20bit ? 1 1 ? = 24bit 0 e 6 selecting an output to digital audio output terminal (bco, l/r and do) ?b7 b6? ? 0 0 ? = normal (internally processed data are outputted.) 0 7 ? 0 1 ? = bco, l/r and do are fixed to "l". ? 1 0 ? = bci, sddy and di are thru-outputted . (for the details, refer to 4-5 in page 9.) ? 1 1 ? = inhibited 0 e
YSS915 20 - 6) tcr($05) : control of tone (bass, treble) - 7) rvr($06) : control of tone (mid-range) and reverb echo correspondence between the setting value and the level bit function default controllable mode 0 0 1 controlling level of bass (fc = 200 hz) (fc = cutoff frequency) 0 2 (for the correspondence between the setting value and the level, refer to the 0e 3 table below.) 0 4 0 5 controlling level of treble (fc = 5 khz) (fc = cutoff frequency) 0 6 (for the correspondence between the setting value and the level, refer to the 0e 7 table below.) 0 bit function default controllable mode 0 0 1 controlling level of mid-tone (fc = 1 khz) (fc = center frequency) 0 2 (for the correspondence between the setting value and the level, refer to the 0e 3 table below.) 0 4 controlling reverb on/off (valid for karaoke program) ? 0 ? = reverb off ? 1 ? = reverb on 0e 5 selection of low pass filter for microphone echo ? 0 ? = cut off frequency equivalent to that of yss903 (standard) ? 1 ? = cut off frequency higher than that of yss903 (wide) 0e 6 unused (set "0" here.) 0- 7 unused (set "0" here.) 0- tcr rvr bit 3 - 0 level of bass bit 7 - 4 level of treble bit 3 - 0 level of mid-tone 7 6 5 4 3 2 1 0 f e d c b a 9 8 inhibited inhibited +10db +8db +6db +4db +2db 0db -2db -4db -6db -8db -10db inhibited inhibited inhibited 7 6 5 4 3 2 1 0 f e d c b a 9 8 inhibited inhibited +10db +8db +6db +4db +2db 0db -2db -4db -6db -8db -10db inhibited inhibited inhibited 7 6 5 4 3 2 1 0 f e d c b a 9 8 inhibited inhibited +10db +8db +6db +4db +2db 0db -2db -4db -6db -8db -10db inhibited inhibited inhibited
YSS915 21 - 8) ker($07) : control of key for microphone correspondence between the setting value and the amount of key shift - 9) phc($08) : output port register bit function default controllable mode 0 this value is outputted at po pin. this function is enabled when mdr[0]($1c) = h. when it is l, po pin is always at l state. 0e 1 unused (set "0" here.) 0- 2 unused (set "0" here.) 0- 3 unused (set "0" here.) 0- 4 unused (set "0" here.) 0- 5 unused (set "0" here.) 0- 6 unused (set "0" here.) 0- 7 unused (set "0" here.) 0- bit function default controllable mode 0 0 1 amount of key shift for controlling microphone key at l channel 0 2 (this function is valid on karaoke program. for the correspondence between 0e 3 the setting value and the amount of key shift, refer to the table below.) 0 4 0 5 amount of key shift for controlling microphone key at r channel 0 6 (this function is valid on karaoke program. for the correspondence between 0e 7 the setting value and the amount of key shift, refer to the table below.) 0 ker bit 3 - 0 amount of key shift at l channel bit 7 - 4 amount of key shift at r channel 7 6 5 4 3 2 1 0 f e d c b a 9 8 inhibited inhibited 1 octave up 3-1/2 keys up 2 keys up 20 cents up 10 cents up no key shift 10 cents down 20 cents down 2 keys down 3-1/2 keys down 1 octave down inhibited inhibited inhibited 7 6 5 4 3 2 1 0 f e d c b a 9 8 inhibited inhibited 1 octave up 3-1/2 keys up 2 keys up 20 cents up 10 cents up no key shift 10 cents down 20 cents down 2 keys down 3-1/2 keys down 1 octave down inhibited inhibited inhibited
YSS915 22 - 10) mlr($10) : microphone level read register (valid for karaoke program) - 11) mdr($1c) : switching kp2 standard mode/kp2v extended mode, and others bit function default controllable mode 0 0 1 0 2 detected microphone level 0 3 ( unsigned binary of 8bits ) 0 4 0e 5 0 6 0 7 0 bit function default controllable mode 0 specifies whether the value of phc[0]($08) is outputted at po pin. ? 0 ? = not outputted (the same as yss903) ? 1 ? = outputted 0e 1 specifies whether the result of zero level detection is outputted at zero pin. ? 0 ? = not outputted (the same as yss903) ? 1 ? = outputted 0e 2 selects band width for microphone echo ? 0 ? = sampling frequency is 8 khz. (the same as yss903) ? 1 ? = sampling frequency is 12 khz. 0e 3 connection with msb justified data output a/d converter ? 0 ? = direct connection not allowed (the same as yss903) ? 1 ? = direct connection allowed 0e 4 selecting karaoke/movie & music program ? 0 ? = karaoke program ? 1 ? = movie & music program (when switching the program, be sure to mute, change the setting of coefficient register and this bit, and then release the mute when 250 ms has passed.) 0e 5 unused 0- 6 switching kp2 standard mode/kp2v extended mode ? 0 ? = kp2 standard mode ? 1 ? = kp2v extended mode 0n,e 7 unused (set "0" here.) 0-
YSS915 23 - 12) c**($20 to $3f) : coefficient registers (controlling volume and delay) bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 c7 c6 c5 c4 c3 c2 c1 c0 c7-c0:sets volume coefficient or delay coefficient for the addresses of the registers their functions for karaoke and movie & music programs, refer to the following table and flow chart described in " operations " section. for the relation between the setting value of coefficient, and volume level and delay time, refer to the formula shown later. when the coefficient registers controllable only in kp2v extended mode is used in the kp2 standard mode, the following preset values are used as their coefficient of address, and their setting values are not used. the values of the registers are indefinite immediately after turning on the power, be sure to set the register values in the controllable mode before releasing the mute. name, function, preset value and controllable mode of the addresses of the coefficient register for karaoke program register address name function preset value controllable mode $20 c00 echo l channel output mixing level -n,e $21 c01 surround l channel output mixing level -n,e $22 c02 audio l channel output mixing level -n,e $23 c03 echo r channel output mixing level -n,e $24 c04 surround r channel output mixing level -n,e $25 c05 microphone echo l channel delay -n,e $26 c06 audio r channel output mixing level -n,e $27 - unused -- $28 c08 microphone echo r channel delay -n,e $29 c09 digital input l - l channel mixing level -n,e $2a c0a digital input l - r channel mixing level -n,e $2b c0b microphone echo l channel feedback level -n,e $2c c0c microphone echo r channel feedback level -n,e $2d c0d microphone echo input level -n,e $2e c0e digital input r - l channel mixing level -n,e $2f c0f digital input r - r channel mixing level -n,e $30 - unused -- $31 - unused -- $32 - unused -- $33 - unused -- $34 c14 time constant for microphone level detection $00 e $35 c15 microphone direct sound output mixing level $1f e $36 c16 microphone echo l channel mixing level $7f e $37 c17 microphone echo r channel mixing level $7f e $38 c18 microphone key control l channel mixing level $00 e $39 c19 microphone key control r channel mixing level $00 e $3a c1a stereo-phonic echo l channel mixing level $00 e $3b c1b stereo-phonic echo r channel mixing level $00 e $3c c1c microphone echo y mersion l channel mixing level $00 e $3d c1d microphone echo y mersion r channel mixing level $00 e $3e c1e l channel total output level $7f e $3f c1f r channel total output level $7f e
YSS915 24 name, function, and controllable mode of the addresses of the coefficient register for movie and music program correspondence between setting value and level of c15 register address name function controllable mode $20 - unused - $21 c01 surround (y mersion) l channel output mixing level e $22 c02 audio & surround (initial reflected sound) l channel output mixing level e $23 - unused - $24 c04 surround (y mersion) r channel output mixing level e $25 - unused - $26 c06 audio & surround (initial reflected sound) r channel output mixing level e $27 - unused - $28 - unused - $29 c09 digital input l - l channel mixing level e $2a c0a digital input l - r channel mixing level e $2b - unused - $2c - unused - $2d - unused - $2e c0e digital input r - l channel mixing level e $2f c0f digital input r - r channel mixing level e $30 c10 surround (initial reflected sound) input 1 l channel mixing level e $31 c11 surround (initial reflected sound) input 1 r channel mixing level e $32 c12 surround (initial reflected sound) input 2 l channel mixing level e $33 c13 surround (initial reflected sound) input 2 r channel mixing level e $34 - unused - $35 c15 microphone direct sound output mixing level e $36 c16 audio l channel output mixing level e $37 c17 audio r channel output mixing level e $38 c18 surround (initial reflected sound) l channel mixing level e $39 c19 surround (initial reflected sound) r channel mixing level e $3a c1a surround (y mersion) input 1 l channel mixing level e $3b c1b surround (y mersion) input 1 r channel mixing level e $3c c1c surround (y mersion) input 2 l channel mixing level e $3d c1d surround (y mersion) input 2 r channel mixing level e $3e c1e l channel total output level e $3f c1f r channel total output level e c15 bit 7-0 level bit 7-0 level bit 7-0 level 00 01 02 03 04 05 06 07 08 09 0a 0b 0 db -1.5db -3.0db -4.5db -6.0db -7.5db -9.0db -10.5db -12.0db -13.5db -15.0db -16.5db 0c 0d 0e 0f 10 11 12 13 14 15 16 17 -18.0db -19.5db -21.0db -22.5db -24.0db -25.5db -27.0db -28.5db -30.0db -31.5db -33.0db -34.5db 18 19 1a 1b 1c 1d 1e 1f 20 | ff -36.0db -37.5db -39.0db -40.5db -42.0db -43.5db -45.0db mute inhibited | inhibited
YSS915 25 relation between setting value of coefficient registers ($20 to $3f), and volume level and delay time
YSS915 26 electrical characteristics 1. absolute maximum ratings item code rating unit power source voltage av dd, dv dd -0.3 to 7.0 v digital input voltage v i -0.5 to dv dd + 0.5 v analog input voltage v i -0.5 to av dd + 0.5 v operating temperature t op 0 to 70 c storage temperature t stg -50 to 125 c 2. recommended operating conditions item code minimum typical maximum unit digital power source voltage dv dd 4.75 5.00 5.25 v analog power source voltage av dd 4.50 5.00 5.25 v operating temperature t op 0 25 70 c 3. dc characteristics (conditions : ta = 0 to 70 c , dv dd = 5.0 +/- 0.25 v) item code condition minimum typical maximum unit power source current i dd v dd = 5.0v 80 ma input voltage h level (1) v ih1 (see note 1) 2.0 v input voltage h level (2) v ih2 (see note 2) 3.5 v input voltage l level v il 0.8 v input leakage current i lk -10 10 m a output voltage h level v oh i oh = -0.4ma v dd -1.0 v output voltage l level v ol i ol = 1.6ma 0.4 v notes ; (1) applies to input terminals other than xisel. (2) applies to input terminal xisel. 4. analog characteristics (conditions : ta = 25 c , dv dd =av dd = 5.0 v) item code condition minimum typical maximum unit analog input voltage v ia (see note 1) (see note 2) v analog output voltage v oa (see note 3) 2.8 v a dc total harmonic distortion thd+n (see note 5,6 ) 0 db 0.04 0.2 % dynamic range dr (see note 4,5,6 ) -60 db 75 80 db analog through total harmonic distortion thd+n (see note 6,7 ) 0 db 0.005 0.02 % dynamic range dr (see note 4,6,7 ) -60 db 90 95 db notes ; input signal frequency is 1khz. (1) peak to peak value. applies to micin terminal (2) any voltage can be used if input resistor attached externally to micin is selected properly v ia =r/9.4k, when value of a resistor was shown with r, (3) peak to peak value. applies to aol and aor terminals. the output voltage is in proportion to av dd . (4) uses ihf-a (5) the signal is outputted through micin inputs to digital outputs via volume. (6) input resistor attached externally to micin : 47 k w . 0 db = 4.65 vpp (7) the signal is outputted through micin inputs to aol and aor via volume.
YSS915 27 5. ac characteristics (conditions : ta = 0 to 70 c , dv dd = 5.0 +/- 0.25 v) item code minimum typical maximum unit xi input frequency fc (see note 1) 12.0 18.5 (see note 3) mhz fc (see note 2) 8.0 12.5 (see note 4) mhz xi duty factor rc 50 % bci frequency f bc 1.0 4.7 (see note 5) mhz bci on/off time t bo 100 (see note 6) ns transfer time t bt 20 ns di, sdsy setup time t ds 80 (see note 7) ns hold time t dh 80 (see note 7) ns do, l/r access time t d -20 20 ns /cs setup time t cs 1/50fs (see note 8) s /sck on/off time t so 1/50fs (see note 8) s /cs, /sck transfer time t ct 1/150fs (see note 8) s cdi setup time t ss 1/100fs (see note 8) s hold time t sh 1/100fs (see note 8) s cdo access time t cd 220 600 ns /ic hold time t ix (see note 9) t il (see note 10) 2 100 ms m s notes ; (1) xi = 384 fs (see note 8.) (2) xi = 256 fs (see note 8.) (3) 37 mhz in thru mode (4) 25 mhz in thru mode (5) 6.2 mhz in thru mode (6) 70 ns in thru mode (7) 50 ns in thru mode (8) fs : sampling frequency (9) just after turn on the power (10) in operation
YSS915 28 2.0v 2.0v 2.0v 0.8v 0.8v 0.8v tct tcs tcs tct tct tct tso tso tss tsh tcd cdo cdi / sck / cs 0.4v 0.4v vdd-1.0v td do,l/r bco 2.0v 2.0v 0.8v 0.8v tbo tbt tbo tbt tds tdh di,sdsy bci 0.8v dvdd / ic 4.75v tix til 0.8v 0.8v
YSS915 29 a procedure to change normal mode to through mode normal mode means that it can apply the sound effect using internal dsp function and the sampling frequency is between 32khz and 48khz in this mode. through mode means that the digital input data fed to YSS915 is bypassed to digital output pin without processing by dsp and the sampling frequency is 64khz to 96khz. for example, when the sampling frequency is changed from 48khz( called fs-single) to 96khz( called fs-double), master clock frequency fed to xi pin of YSS915 may be changed according to the fs(sampling frequency). in this case please refer to the following procedure. a. change normal mode (fs-single) to through mode (fs-double) 1. mute analog output of the product 2. set /ic=0 of YSS915 3. change the master clock frequency (xi of YSS915) from single to double 4. wait 2msec or more 5. set /ic=1 6. set the parameters from the microprocessor to YSS915 as followed opr [7:0] = 8bxx00x0x1 mdr [7:0] = 8b01100000 dar [7:0] = 8b10xx01xx or 8b10xx10xx or 8b10xx11xx x means dont care 7. disable to mute analog output of the product b. change through mode (fs-double) to normal mode (fs-single) 1. mute analog output of the product 2. set /ic=0 of YSS915 3. change the master clock frequency (xi of YSS915) from double to single 4. wait 2msec or more 5. set /ic=1 6. set the parameters from the microprocessor to YSS915 as the same way after power on 2msec min mute mute of analog out / ic of YSS915 xi of YSS915 setting from microprocessor to YSS915 single double setting 2msec min mute mute of analog out / ic of YSS915 xi of YSS915 setting from microprocessor to YSS915 double single setting
YSS915 30 external dimensions
YSS915 31 memo
YSS915 32 important notice 1. yamaha reserves the right to make changes to its products and to this document without notice. the information contained in this document has been carefully checked and is believed to be reliable. however, yamaha assumes no responsibilities for inaccuracies and makes no commitment to update or to keep current the information contained in this document. 2. these yamaha products are designed only for commercial and normal industrial applications, and are not suitable for other uses, such as medical life support equipment, nuclear facilities, critical care equipment or any other application the failure of which could lead to death, personal injury or environmental or property damage. use of the products in any such application is at the customer?s sole risk and expanse. 3. yamaha assumes no liability for incidental, consequential or special damages or injury that may result from misapplication or improper use or operation of the products. 4. yamaha makes no warranty or representation that the products are subject to intellectual property license from yamaha or anythird party, and yamaha makes no warranty or representation of non- infringement with respect to the products. yamaha specifically excludes any liability to the customer or any third party arising from or related to the products? infringement of any third party?s intellectual property rights, including the patent, copyright, trademark or trade secret rights of any third party. 5. examples of use described herein are merely to indicate the characteristics and performance of yamaha products. yamaha assumes no responsibility for any intellectual property claims or other problems that may result from applications based on the examples described herein. yamaha makes no warranty with respect to the products express or implied, including, but not limited to the warranties of merchantability, fitness for a particular use and title. note) the specifications of this product are subject to improvement changes without prior notice yamaha corporation agency address inquiries to: semiconductor sales & marketing department n head office 203,matsunokijima, toyooka-mura, iwata-gun, shizuoka-ken, 438-0192 tel. 81-539-62-4918 fax. 81-539-62-5054 n tokyo office 2-17-11, takanawa, minato-ku, tokyo, 108-8568 tel. 81-3-5488-5431 fax. 81-3-5488-5088 n osaka office namba tujimoto nissei bldg, 4f 1-13-17, namba naka, naniwa-ku, osaka city, osaka, 556-0011 tel. +81-6-6633-3690 fax. +81-6-6633-3691 n u.s.a. office yamaha systems technology. 100 century center count, san jose, ca 95112 tel. 1-408-467-2300 fax. 1-408-437-8791 copying prohibited ? 1987 yamaha corporation

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