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| asahi kasei [ak4633] ms0447-e-03 2006/04 - 1 - general description the ak4633 is a 16-bit mono codec with microphone-amplifier and speaker-amplifier. input circuits include a microphone-amplifier and an alc (automatic level control) circuit. output circuits include a speaker-amplifier and mono line output. the ak4633 suits a moving picture of digital still camera and etc. this speaker-amplifier supports a piezo speaker. the ak4633 is housed in a space-saving 24-pin qfn package. feature 1. 16-bit delta-sigma mono codec 2. recording function ? 1ch mono input ? 1 st mic amplifier: 0db, 6db, 10db, 14db, 17db, 20db, 26db or 32db ? 2 nd amplifier with alc: +36db -54db, 0.375db step, mute ? adc performance (mic-amp= +20db): s/(n+d): 84db, dr, s/n: 85db ? wind noise reduction ? notch filter 3. playback function ? digital alc (automatic level control): +36db -54db, 0.375db step, mute ? mono line output performance: s/(n+d): 85db, s/n: 93db ? mono speaker-amp - speaker-amp performance: s/(n+d): 60db (150mw@ 8 ? ) output noise level: -87dbv - btl output - output power: 400mw @ 8 ? ? beep input 4. power management 5. flexible pll mode: ? frequencies: 11.2896mhz, 12mhz, 12.288mhz, 13.5mhz, 24mhz, 27mhz (mcki pin) 1fs (fck pin) 16fs, 32fs or 64fs (bick pin) 6. ext mode: ? frequencies: 256fs, 512fs or 1024fs (mcki pin) 7. sampling rate: ? pll slave mode (fck pin) : 7.35khz ~ 48 khz ? pll slave mode (bick pin) : 7.35khz ~ 48khz ? pll slave mode (mcki pin): 8khz, 11.025khz, 12khz, 16khz, 22.05khz, 24khz, 32khz, 44.1khz, 48khz ? pll master mode: 8khz, 11.025khz, 12khz, 16khz, 22.05khz, 24khz, 32khz, 44.1khz, 48khz ? ext slave mode/ext master mode: 7.35khz ~ 48khz (256fs), 7.35khz ~ 26khz (512fs), 7.35khz ~ 13khz (1024fs) 8. output master clock frequency: 256fs 9. serial p interface: 3-wire 10. master / slave mode ak4633 16-bit ? mono codec with alc & mic/spk-amp
asahi kasei [ak4633] ms0447-e-03 2006/04 - 2 - 11. audio interface format: msb first, 2?s compliment ? adc: dsp mode, 16bit msb justified, i 2 s ? dac: dsp mode, 16bit msb justified, 16bit lsb justified, i 2 s 12. ta = -40 85 c 13. power supply ? avdd: 2.2 3.6v (typ. 3.3v) ? dvdd: 1.6 3.6v (typ. 3.3v) ? svdd: 2.2 4.0v (typ. 3.3v) 14. power supply current: 12ma (all power on) 15. package: 24pin qfn(4mmx4mm) ? block diagram mic power supply a/d hpf pmmp pmadc audio i/f d/a pmdac line out pmspk speaker pll pmbp pmpll control register mpi mic/micp spp spn svdd svss beep/micn avdd a vss vcom dvdd csn pdn cclk cdti bick fck sdto sdti mcko mcki vcoc pmao aout dvss mic-amp 0db /+6db/+10db/+14db/+17db +20db / +26db / +32db mic hpf 2 band eq vol (alc) pmpfil figure 1. ak4633 block diagram asahi kasei [ak4633] ms0447-e-03 2006/04 - 3 - ? ordering guide ak4633vn ? 40 +85 c 24pin qfn (0.5mm pitch) AKD4633 evaluation board for ak4633 ? pin layout svss svdd a out beep/micn mpi mic/micp spn spp mcko mcki dvss dvdd vcom a vss avdd vcoc pdn csn bick fck sdto sdti cdti cclk ak4633vn top view 19 20 21 22 23 24 18 17 16 1 12 11 10 9 8 7 15 14 13 2 3 4 5 6 asahi kasei [ak4633] ms0447-e-03 2006/04 - 4 - ? interchange with ak4631 1. function function ak4631 ak4633 avdd 2.6v 3.6v 2.2v 3.6v dvdd 2.6v 3.6v 1.6v 3.6v svdd 2.6v 5.25v 2.2v 4.0v mic input single-end single-end / differential mic power output voltage 0.75 x avdd 0.8 x avdd mic-amp 0db/+20db/+26db/+32db 0db/+6db/+10db/+14db +17db/+20db/+26db/+32db hpf for wind noise reduction no yes notch filter no yes alc for input signal analog alc digital alc (note 1) input volume +27.5db -8db, 0.5db step +36db -54db, 0.375db step (note 1) alc for output signal speaker-amp block digital block (note 1) output volume +12db -115db, 0.5db step +36db -54db, 0.375db step (note 1) maximum output for spk-amp (using piezo speaker) 8.5vpp@svdd=5v 6.33vpp@svdd=3.8v mcki pull-down resistance yes no (delete mckpd bit ) package 28pin qfn 5.2mm x 5.2mm 41pin bga 4.0mm x 4.0mm 24pin qfn 4.0mm x 4.0mm note 1. alc and volume circuits are shared by input and output. therefore, it is impossible to use alc and volume function at same time for both recording and playback mode. asahi kasei [ak4633] ms0447-e-03 2006/04 - 5 - 2. register map (1) ak4631 addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management 1 0 pmvcm pmbp pmspk pmao pmdac pmmic pmadc 01h power management 2 0 0 0 0 m/s mckpd mcko pmpll 02h signal select 1 spps beeps alc2s daca dacm mpwr micad mgain0 03h signal select 2 0 aopsn mgai n1 spkg1 spkg0 beepa alc1m alc1a 04h mode control 1 pll3 pll2 pl l1 pll0 bcko1 bcko0 dif1 dif0 05h mode control 2 0 0 fs3 msbs bckp fs2 fs1 fs0 06h timer select dvtm rotm ztm1 ztm0 wtm1 wtm0 ltm1 ltm0 07h alc mode control 1 0 alc2 alc1 zelm lmat1 lmat0 ratt lmth 08h alc mode control 2 0 ref6 re f5 ref4 ref3 ref2 ref1 ref0 09h input pga control 0 ipga6 ipga 5 ipga4 ipga3 ip ga2 ipga1 ipga0 0ah digital volume control ovol7 ovol6 ovol5 ovol4 ovol3 ovol2 ovol1 ovol0 0bh alc2 mode control 0 0 rfs5 rfs4 rfs3 rfs2 rfs1 rfs0 (2) ak4633 addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management 1 pmpfil pmvcm pmbp pmspk pmao pmdac 0 pmadc 01h power management 2 0 0 0 0 m/s 0 mcko pmpll 02h signal select 1 sppsn beeps dacs daca 0 pmmp mgain2 mgain0 03h signal select 2 pfsdo aops mgain1 spkg1 spkg0 beepa pfdac adcpf 04h mode control 1 pll3 pll2 pl l1 pll0 bcko1 bcko0 dif1 dif0 05h mode control 2 adrst fcko fs3 msbs bckp fs2 fs1 fs0 06h timer select 0 0 ztm1 ztm0 wtm1 wtm0 rfst1 rfst0 07h alc mode control 1 0 alc2 alc1 zelmn lmat1 lmat0 rgain0 lmth0 08h alc mode control 2 iref7 iref6 iref5 iref4 iref3 iref2 iref1 iref0 09h digital volume control ivol7 ivol6 ivol5 ivol4 ivol3 ivol2 ivol1 ivol0 0ah digital volume control ovol7 ovol6 ovol5 ovol4 ovol3 ovol2 ovol1 ovol0 0bh alc mode control 3 rgain1 lmth1 oref5 oref4 oref3 oref2 oref1 oref0 0dh alc level vol7 vol6 vol5 vol4 vol3 vol2 vol1 vol0 0eh signal select 3 datt1 datt0 smute mdif eq2 eq1 hpf hpfad 10h - 1fh digital filter setting hatching register bits changed from the ak4631. bold register bits added from the ak4631. asahi kasei [ak4633] ms0447-e-03 2006/04 - 6 - 3. register setting (1) when pll reference clock is input from fck or bick pin, the setting of fs3-0 bits is changed as shown in the following table. mode fs3 bit fs2 bit fs1 bit fs0 bit sampling frequency range 0 0 0 don?t care don?t care 7.35khz fs 12khz 1 0 1 don?t care don?t care 12khz < fs 24khz 2 1 0 don?t care don?t care 24khz < fs 48khz others others n/a all of modes are changed from ak4631. (2) in ext slave mode, the setting of fs3-0 bits is changed as shown in the following table. . mode fs3-2 bits fs1 bit fs0 bit mcki input frequency sampling frequency range 0 don?t care 0 0 256fs 7.35khz fs 48khz 1 don?t care 0 1 1024fs 7.35khz < fs 13khz 2 don?t care 1 0 512s 7.35khz < fs 26khz 3 don?t care 1 1 256fs 7.35khz fs 48khz hatching parts are the setting changed from ak4631. asahi kasei [ak4633] ms0447-e-03 2006/04 - 7 - pin / function no. pin name i/o function 1 vcom o common voltage output pin, 0.45 x avdd bias voltage of adc inputs and dac outputs. 2 avss - analog ground pin 3 avdd - analog power supply pin 4 vcoc o output pin for loop filter of pll circuit this pin should be connected to avss with one resistor and capacitor in series. 5 pdn i power-down mode pin ? h ? : power up, ? l ? : power down reset and initialize the control register. ak4633 should always be reset upon power-up. 6 csn i chip select pin 7 cclk i control data clock pin 8 cdti i/o control data input pin / output pin 9 sdti i audio serial data input pin 10 sdto o audio serial data output pin 11 fck i/o frame clock pin 12 bick i/o audio serial data clock pin 13 dvdd - digital power supply pin 14 dvss - digital ground pin 15 mcki i external master clock input pin 16 mcko o master clock output pin 17 spp o speaker amp positive output pin 18 spn o speaker amp negative output pin 19 svss - speaker amp ground pin 20 svdd - speaker amp power supply pin 21 aout o mono line output pin 22 beep i beep signal input pin (mdif bit = ? 0 ? ) micn i microphone negative input pin for differential input (mdif bit = ? 1 ? ) 23 mpi o mic power supply pin for microphone 24 mic i microphone input pin for single ended input (mdif bit = ? 0 ? ) micp i microphone positive input pin for differential input (mdif bit = ? 1 ? ) note: all input pins except analog input pins (mic/micp and beep/micn pins) should not be left floating. asahi kasei [ak4633] ms0447-e-03 2006/04 - 8 - ? handling of unused pin the unused i/o pins should be processed appropriately as below. classification pin name setting analog mic/micp, beep/micn, mpi, aout, spp, spn, vcoc these pins should be open. mcki, sdti these pins should be connected to dvss. fck, bick (note) these pins should be connected to dvss, or should be pulled-down/pulled-up by about 100k ? resister . digital mcko, sdto these pins should be open. (note) when the ak4633 is used by the slave mode (m/sbit= ? 0 ? ), these pins should be connected to dvss. when the ak4633 is used by the master mode (m/sbit= ? 1 ? ), these pins should be pulled-down or pulled-up by about 100k ? resistor. absoluate maximum rating (avss, dvss, svss=0v; note 2) parameter symbol min max units power supplies: analog digital speaker-amp |avss ? dvss| (note 3) |avss ? svss| (note 3) avdd dvdd svdd ? gnd1 ? gnd2 ? 0.3 ? 0.3 ? 0.3 - - 4.6 4.6 4.6 0.3 0.3 v v v v v input current, any pin except supplies iin - 10 ma analog input voltage (note 5) vina ? 0.3 avdd+0.3 v digital input voltage (note 6) vind ? 0.3 dvdd+0.3 v ambient temperature (powered applied) ta ? 40 85 c storage temperature tstg ? 65 150 c maximum power dissipation (note 4) pd - 650 mw note 2. all voltages with respect to ground. note 3. avss, dvss and svss must be connected to the same analog ground plane. note 4. in case that pcb wiring density is 100%. this power is the ak4633 internal dissipation that does not include power of externally connected speaker. note 5. beep/micn, mic/micp pins note 6. pdn, csn, cclk, cdti, sdti, fck, bick, mcki pins warning: operation at or beyond these limits may result in permanent damage to the device. normal operation is not guaranteed at these extremes. asahi kasei [ak4633] ms0447-e-03 2006/04 - 9 - recommended operating conditions (avss, dvss, svss=0v; note 2) parameter symbol min typ max units power supplies (note 7) analog digital speaker-amp difference avdd dvdd svdd dvdd - avdd dvdd - svdd 2.2 1.6 2.2 - - 3.3 3.3 3.3 - - 3.6 3.6 4.0 0.3 0.3 v v v v v note 2. all voltages with respect to ground. note 7. the power up sequence between avdd, dvdd and svdd is not critical. it is not permit to power dvdd off only when avdd or svdd is powered up. when the power supplies except dvdd are partially powered off, the ak4633 must be reset by bringing pdn pin ? l ? after these power supplies are powered on again. if avdd is powered off when dvdd is powered up, the pmadc bit should be set to ? 0 ? before avdd is powered off. * akm assumes no responsibility for the usag e beyond the conditions in this datasheet. asahi kasei [ak4633] ms0447-e-03 2006/04 - 10 - analog chracteristics (ta=25 c; avdd, dvdd, svdd=3.3v; avss=dvss=svss=0v; fs=8khz, bick=64fs; signal frequency=1khz; 16bit data; measurement frequency=20hz 3.4khz; ext slave mode; unless otherwise specified) parameter min typ max units mic amplifier : mdif bit = ? 0 ? ; (single-ended input) input resistance 20 30 40 k ? gain (mgain2-0 bits = ? 000 ? ) - 0 - db (mgain2-0 bits = ? 001 ? ) - 20 - db (mgain2-0 bits = ? 010 ? ) - 26 - db (mgain2-0 bits = ? 011 ? ) - 32 - db (mgain2-0 bits = ?1 00 ? ) - 6 - db (mgain2-0 bits = ? 101 ? ) - 10 - db (mgain2-0 bits = ? 110 ? ) - 14 - db (mgain2-0 bits = ? 111 ? ) - 17 - db mic amplifier : mdif bit = ? 1 ? ; (full-differential input) input voltage (mgain2-0 bits = ? 001 ? ) - - 0.228 vpp (note 8) (mgain2-0 bits = ? 010 ? ) - - 0.114 vpp (mgain2-0 bits = ? 011 ? ) - - 0.057 vpp (mgain2-0 bits = ?1 00 ? ) - - 1.14 vpp (mgain2-0 bits = ? 101 ? ) - - 0.721 vpp (mgain2-0 bits = ? 110 ? ) - - 0.455 vpp (mgain2-0 bits = ? 111 ? ) - - 0.322 vpp mic power supply: mpi pin output voltage (note 9) 2.38 2.64 2.90 v load resistance 2 - - k ? load capacitance - - 30 pf adc analog input characteristics: mic ? adc, mic gain=20db, ivol=0db, alc1bit = ? 0 ? resolution - - 16 bits input voltage (mic gain=20db,note 10) 0.168 0.198 0.228 vpp s/(n+d) ( ? 1dbfs) (note 11) 72 84 - db d-range ( ? 60dbfs) 75 85 - db s/n 75 85 - db dac characteristics: resolution 16 bits mono line output characteristics: aout pin, dac aout, r l =10k ? output voltage (note 12) 1.78 1.98 2.18 vpp s/(n+d) (0dbfs) (note 11) 73 85 - db d-range (-60dbfs) 83 93 - db s/n 83 93 - db load resistance 10 - - k ? load capacitance - - 30 pf speaker-amp characteristics: dac ? spp/spn pins, alc2 bit = ? 0 ? , r l =8 ? , btl, svdd=3.3v spkg1-0 bits = ? 00 ? (-4.1dbfs) 2.54 3.17 3.80 vpp output voltage spkg1-0 bits = ? 01 ? (-4.1dbfs) 3.20 4.00 4.80 vpp s/(n+d) as 150mw output power 40 60 - db as 400mw output power - 20 - db output noise spkg1-0 bits = ? 00 ? - -87 - dbv level spkg1-0 bits = ? 01 ? -75 -85 - dbv spkg1-0 bits = ? 10 ? - -83 - dbv load resistance 8 - - ? load capacitance - - 30 pf asahi kasei [ak4633] ms0447-e-03 2006/04 - 11 - parameter min typ max units speaker-amp characteristics: dac ? spp/spn pins, alc2=off, c l =3 f, r serial =10 ? x 2, btl, svdd=3.8v output voltage spkg1-0 bits = ? 11 ? (-4.1dbfs) - 6.33 - vpp s/(n+d) (note 13) spkg1-0 bits = ? 11 ? (-4.1dbfs) - 60 - db output noise level (note 13) spkg1-0 bits = ? 11 ? - -81 - dbv load impedance (note 14) 50 - - ? load capacitance - - 3 f beep input: beep pin, external input resistance= 20k ? maximum input voltage (note 15) - 1.98 - vpp output voltage (input voltage=0.6vpp) beep ? spp/spn (spkg1-0 bits = ? 00 ? ) 0.625 1.25 1.875 vpp beep ? aout 0.25 0.50 0.75 vpp power supplies power up (pdn = ? h ? ) all circuit power-up: (note 17) avdd+dvdd fs=8khz - 8 - ma fs=48khz - 11 17 ma svdd: speaker-amp normal operation (sppsn bit = ? 1 ? , no output) svdd=3.3v - 4 12 ma power down (pdn = ? l ? ) (note 18) avdd+dvdd+svdd - 1 100 a note 8. it is a differential value of plus and minus input pin. each input pins should be connected to the ac coupling capacitance serially. the differential input is not permission when mgain2-0 bits are ? 000 ?. the maximum i nput voltage of micp and micn pins are proportional to avdd voltage. vin= |(micp) ? (micn)| = 0.069 x avdd (max)@mgain2-0 bits = ? 001 ? , 0.035 x avdd (max)@mgain2-0 bits = ? 010 ? , 0.017 x avdd (max)@mgain2-0 bits = ? 011 ? , 0.346 x avdd (max)@mgain2-0 bits = ? 100 ? , 0.218 x avdd (max)@mgain2-0 bits = ? 101 ? , 0.138 x avdd (max)@mgain2-0 bits = ? 110 ? , 0.098 x avdd (max)@mgain2-0 bits = ? 111 ? , adc function is not assumed for using the exceeded input voltage. note 9. output voltage is proportional to avdd voltage. vout = 0.8 x avdd (typ). note 10. input voltage is proportional to avdd voltage. vin = 0.06 x avdd (typ). note 11. when a pll reference clock is fck pin in pll slave mode, s/(n+d):mic ? adc is 75db (typ) and s/(n+d):dac ? aout is 75db(typ). note 12. output voltage is proportional to avdd voltage. vout = 0.6 x avdd (typ). note 13. in case of measuring between spp pin and spn pin directly. note 14. load impedance is total impedance of series resist ance and piezo speaker impedance at 1khz in figure 41. load capacitance is capacitance of piezo speaker. when piezo speaker is used, 10 ? or more series resistors should be connected at both spp and spn pins, respectively. note 15. the maximum input voltage of the beep is proportional to avdd voltage and external input resistance (rin). vout = 0.6 x avdd x rin/20k ? (max). note 16. output voltage is proportional to avdd voltage. vout = 0.6 x avdd (typ). note 17. in case of pll master mode (mcki=12.288mhz) and pmmp = pmadc = pmdac = pmpfil = pmspk = pmvcm = pmpll = mcko = pmao = pmbp = pmmp = m/s = ? 1 ? . in this case, the output current of mpi pin is 0ma. when the ak4633 is ext mode (pmpll = mcko = m/s = ? 0 ? ), ? avdd+dvdd ? is typically 6ma@fs=8khz, 9ma@fs=48khz. note 18. all digital inputs pins are fixed to dvdd or dvss. asahi kasei [ak4633] ms0447-e-03 2006/04 - 12 - filter chracteristics (ta = 25 c; avdd =2.2 3.6v, dvdd =1.6 3.6v, svdd =2.2 4.0v; fs=8khz) parameter symbol min typ max units adc digital filter (decimation lpf): passband (note 19) 0.16db ? 0.66db ? 1.1db ? 6.9db pb 0 - - - - 3.5 3.6 4.0 3.0 - - - khz khz khz khz stopband (note 19) sb 4.7 - - khz passband ripple pr - - 0.1 db stopband attenuation sa 73 - - db group delay (note 20) gd - 16 - 1/fs group delay distortion ? gd - 0 - s dac digital filter (decimation lpf): passband (note 19) 0.16db ? 0.54db ? 1.0db ? 6.7db pb 0 - - - - 3.5 3.6 4.0 3.0 - - - stopband (note 19) sb 4.7 - - khz passband ripple pr - - 0.1 db stopband attenuation sa 73 - - db group delay (note 20) gd - 16 - 1/fs group delay distortion ? gd - 0 - s dac digital filter + analog filter: frequency response: 0 3.4khz fr - 1.0 - db note 19. the passband and stopband frequencies are proportional to fs (system sampling rate). for example, adc is pb=3.6khz (@-1.0db)= 0.45 x fs. a reference of frequency response is 1khz. note 20. the calculated delay time caused by digital filtering. this time is from the input of analog signal to setting of the 16-bit data of a channel from the input register to the output register of the adc. for the dac, this time is from setting the 16-bit data of a channel from the input register to the output of analog signal. in case of selected the path through the programming filter (1 st hpf + 2-band equalizer + alc), the group delay should be increased to 2/fs without the phase changing by iir filter. dc chracteristics (ta = 25 c; avdd =2.2 3.6v, dvdd =1.6 3.6v, svdd =2.2 4.0v) parameter symbol min typ max units high-level input voltage (dvdd 2.2v) (dvdd < 2.2v) low-level input voltage (dvdd 2.2v) (dvdd < 2.2v) vih vil 70%dvdd 80%dvdd - - - - - - - - 30%dvdd 20%dvdd v v v v high-level output voltage (iout= ? 80 a) low-level output voltage (iout= 80 a) voh vol dvdd ? 0.4 - - - - 0.4 v v input leakage current iin - - 10 a asahi kasei [ak4633] ms0447-e-03 2006/04 - 13 - switing characteristics (ta = 25 c; avdd =2.2 3.6v, dvdd =1.6 3.6v, svdd =2.2 4.0v; c l =20pf) parameter symbol min typ max units pll master mode (pll reference clock = mcki pin) (figure 2) mcki input: frequency pulse width low pulse width high fclk tclkl tclkh 11.2896 0.4/fclk 0.4/fclk - - - 27.0 - - mhz ns ns mcko output: frequency duty cycle except fs=29.4khz,32khz fs=29.4khz, 32khz (note 21) fmck dmck dmck - 40 - 256 x ffck 50 33 - 60 - khz % % fck output: frequency pulse width high (dif1-0 bits = ? 00 ? and fcko bit = ? 1 ? ) duty cycle (dif1-0 bits ? 00 ? or fcko bit = ? 0 ? ) ffck tfckh dfck 8 - - - tbck 50 48 - - khz ns % bick: period (bcko1-0 = ? 00 ? ) (bcko1-0 = ? 01 ? ) (bcko1-0 = ? 10 ? ) duty cycle tbck tbck tbck dbck - - - - 1/16ffck 1/32ffck 1/64ffck 50 - - - - ns ns ns % audio interface timing dsp mode: (figure 3, figure 4) fck ? ? to bick ? ? (note 22) fck ? ? to bick ? ? (note 23) bick ? ? to sdto (bckp = ? 0 ? ) bick ? ? to sdto (bckp = ? 1 ? ) sdti hold time sdti setup time tdbf tdbf tbsd tbsd tsdh tsds 0.5 x tbck -40 0.5 x tbck -40 -70 -70 50 50 0.5 x tbck 0.5 x tbck - - - - 0.5 x tbck + 40 0.5 x tbck +40 70 70 - - ns ns ns ns ns ns except dsp mode: (figure 5) bick ? ? to fck edge fck to sdto (msb) (except i 2 s mode) bick ? ? to sdto sdti hold time sdti setup time tbfck tfsd tbsd tsdh tsds -40 -70 -70 50 50 - - - - - 40 70 70 - - ns ns ns ns ns asahi kasei [ak4633] ms0447-e-03 2006/04 - 14 - parameter symbol min typ max units pll slave mode (pll reference clock: fck pin) (figure 6,figure 7) fck: frequency dsp mode: pulse width high except dsp mode: duty cycle ffck tfckh duty 7.35 tbck-60 45 8 - - 48 1/ffck-tbck 55 khz ns % bick: period pulse width low pulse width high tbck tbckl tbckh 1/64ffck 0.4 x tbck 0.4 x tbck - - - 1/16ffck - - ns ns ns pll slave mode (pll reference clock: bick pin) (figure 6,figure 7) fck: frequency dsp mode: pulse width high except dsp mode: duty cycle ffck tfckh duty 7.35 tbck-60 45 8 - - 48 1/ffck-tbck 55 khz ns % bick: period (pll3-0 = ? 0001 ? ) (pll3-0 = ? 0010 ? ) (pll3-0 = ? 0011 ? ) pulse width low pulse width high tbck tbck tbck tbckl tbckh - - - 0.4 x tbck 0.4 x tbck 1/16ffck 1/32ffck 1/64ffck - - - - - - - ns ns ns ns ns pll slave mode (pll reference clock: mcki pin) (figure 8) mcki input: frequency pulse width low pulse width high fclk fclkl fclkh 11.2896 0.4/fclk 0.4/fclk - - - 27.0 - - mhz ns ns mcko output: frequency duty cycle except fs=29.4khz, 32khz fs=29.4khz, 32khz (note 21) fmck dmck dmck - 40 - 256 x ffck 50 33 - 60 - khz % % fck: frequency dsp mode: pulse width high except dsp mode: duty cycle ffck tfckh duty 8 tbck-60 45 - - - 48 1/ffck-tbfck 55 khz ns % bick: period pulse width low pulse width high tbck tbckl tbckh 1/64ffck 0.4 x tbck 0.4 x tbck - - - 1/16ffck - - ns ns ns audio interface timing dsp mode: (figure 9, figure 10) fck ? ? to bick ? ? (note 22) fck ? ? to bick ? ? () bick ? ? to fck ? ? (note 22) bick ? ? to fck ? ? () bick ? ? to sdto (bckp = ? 0 ? ) bick ? ? to sdto (bckp = ? 1 ? ) sdti hold time sdti setup time tfckb tfckb tbfck tbfck tbsd tbsd tsdh tsds 0.4 x tbck 0.4 x tbck 0.4 x tbck 0.4 x tbck - - 50 50 - - - - - - - - - - - - 80 80 - - ns ns ns ns ns ns ns ns except dsp mode: (figure 12) fck edge to bick ? ? (note 24) bick ? ? to fck edge (note 24) fck to sdto (msb) (except i 2 s mode) bick ? ? to sdto sdti hold time sdti setup time tfckb tbfck tfsd tbsd tsdh tsds 50 50 - - 50 50 - - - - - - - - 80 80 - - ns ns ns ns ns ns asahi kasei [ak4633] ms0447-e-03 2006/04 - 15 - parameter symbol min typ max units ext slave mode (figure 11) mcki frequency: 256fs 512fs 1024fs pulse width low pulse width high fclk fclk fclk tclkl tclkh 1.8816 3.7632 7.5264 0.4/fclk 0.4/fclk 2.048 4.096 8.192 - - 12.288 13.312 13.312 - - mhz mhz mhz ns ns fck frequency (mcki = 256fs) (mcki = 512fs) (mcki = 1024fs) duty cycle ffck ffck ffck duty 7.35 7.35 7.35 45 8 8 8 - 48 26 13 55 khz khz khz % bick period bick pulse width low pulse width high tbck tbckl tbckh 312.5 130 130 - - - - - - ns ns ns audio interface timing (figure 12) fck edge to bick ? ? (note 24) bick ? ? to fck edge (note 24) fck to sdto (msb) (except i 2 s mode) bick ? ? to sdto sdti hold time sdti setup time tfckb tbfck tfsd tbsd tsdh tsds 50 50 - - 50 50 - - - - - - - - 80 80 - - ns ns ns ns ns ns asahi kasei [ak4633] ms0447-e-03 2006/04 - 16 - parameter symbol min typ max units ext master mode (figure 2) mcki frequency: 256fs 512fs 1024fs pulse width low pulse width high fclk fclk fclk tclkl tclkh 1.8816 3.7632 7.5264 0.4/fclk 0.4/fclk 2.048 4.096 8.192 - - 12.288 13.312 13.312 - - mhz mhz mhz ns ns fck frequency (mcki = 256fs) (mcki = 512fs) (mcki = 1024fs) duty cycle ffck ffck ffck dfck 7.35 7.35 7.35 - 8 8 8 50 48 26 13 - khz khz khz % bick: period (bcko1-0 bit= ? 00 ? ) (bcko1-0 bit= ? 01 ? ) (bcko1-0 bit= ? 10 ? ) duty cycle tbck tbck tbck dbck - - - - 1/16ffck 1/32ffck 1/64ffck 50 - - - - ns ns ns % audio interface timing dsp mode: (figure 3, figure 4) fck ? ? to bick ? ? (note 22) fck ? ? to bick ? ? (note 23) bick ? ? to sdto (bckp bit= ? 0 ? ) bick ? ? to sdto (bckp bit= ? 1 ? ) sdti hold time sdti setup time tdbf tdbf tbsd tbsd tsdh tsds 0.5 x tbck -40 0.5 x tbck -40 -70 -70 50 50 0.5 x tbck 0.5 x tbck - - - - 0.5 x tbck + 40 0.5 x tbck +40 70 70 - - ns ns ns ns ns ns except dsp mode: (figure 5) bick ? ? to fck edge fck to sdto (msb) (except i 2 s mode) bick ? ? to sdto sdti hold time sdti setup time tbfck tfsd tbsd tsdh tsds -40 -70 -70 50 50 - - - - - 40 70 70 - - ns ns ns ns ns note 21. duty cycle = (the width of ? l ? ) / (the period of clock) 100 note 22. msbs, bckp bits = ? 00 ? or ? 11 ? note 23. msbs, bckp bits = ? 01 ? or ? 10 ? note 24. bick rising edge must not occur at the same time as fck edge. asahi kasei [ak4633] ms0447-e-03 2006/04 - 17 - parameter symbol min typ max units control interface timing: cclk period cclk pulse width low pulse width high cdti setup time cdti hold time csn ? h ? time csn ? ? to cclk ? ? cclk ? ? to csn ? ? cclk ? ? to cdti (at read command) csn ? ? to cdti (hi-z) (at read command) tcck tcckl tcckh tcds tcdh tcsw tcss tcsh tdcd tccz 200 80 80 40 40 150 150 50 - - - - - - - - - - - - - - - - - - - - 70 70 ns ns ns ns ns ns ns ns ns ns reset timing pdn pulse width (note 25) pmadc ? ? to sdto valid (note 26) adrst bit = ? 0 ? adrst bit = ? 1 ? tpd tpdv tpdv 150 - - - 1059 291 - - - ns 1/fs 1/fs note 25. the ak4633 can be reset by the pdn pin = ? l ?. note 26. this is the count of fck ? ? from the pmadc = ? 1 ? . asahi kasei [ak4633] ms0447-e-03 2006/04 - 18 - ? timing diagram fck 1/fclk mcki tclkh tclkl vih vil 1/fmck mcko tmckoh tmckol 50%dvdd 1/ffck dfck dfck 50%dvdd dmck = tmckol x fmck x 100% figure 2. clock timing (pll/ext master mode) (mcko isn?t available at ext master mode) fck bick 50%dvdd sdto 50%dvdd tbsd tsds sdti vil tsdh vih dbck tdbf 50%dvdd tbck msb msb bick 50%dvdd (bckp = "0") (bckp = "1") figure 3. audio interface timing (pll/ext master mode & dsp mode: msbs = ? 0 ? ) asahi kasei [ak4633] ms0447-e-03 2006/04 - 19 - fck bick 50%dvdd sdto 50%dvdd tbsd tsds sdti vil tsdh vih dbck tdbf 50%dvdd tbck msb bick 50%dvdd (bckp = "1") (bckp = "0") msb figure 4. audio interface timing (pll/ext master mode & dsp mode: msbs = ? 1 ? ) fck 50%dvdd bick 50%dvdd sdto 50%dvdd tbsd tsds sdti vil tsdh vih tbfck dbck tfsd figure 5. audio interface timing (pll/ext master mode & except dsp mode) asahi kasei [ak4633] ms0447-e-03 2006/04 - 20 - 1/ffck fck vih tfckh vil tbck bick tbckh tbckl vih vil tbfck bick vih vil (bckp = "0") (bckp = "1") figure 6. clock timing (pll slave mode ; pll reference clock = fck or bick pin & dsp mode; msbs = 0) 1/ffck fck vih tfckh vil tbck bick tbckh tbckl vih vil tbfck bick vih vil (bckp = "1") (bckp = "0") figure 7. clock timing (pll slave mode; pll reference clock = fck or bick pin & dsp mode; msbs = 1) asahi kasei [ak4633] ms0447-e-03 2006/04 - 21 - 1/fclk mcki tclkh tclkl vih vil 1/ffck fck vih vil tbck bick tbckh tbckl vih vil tfckh tfckl 1/fmck mcko 50%dvdd tmckoh tmckol dmck = tmckol x fmck x 100% figure 8. clock timing (pll slave mode; pll reference clock = mcki pin & except dsp mode) asahi kasei [ak4633] ms0447-e-03 2006/04 - 22 - fck bick sdto 50%dvdd tbsd tsds sdti vil tsdh vih tfckb tfckh msb msb vil vih vil vih bick vil vih (bckp = "0") (bckp = "1") figure 9. audio interface timing (pll slave mode & dsp mode; msbs = 0) fck bick sdto 50%dvdd tbsd tsds sdti vil tsdh vih tfckb tfckh msb msb vil vih vil vih bick vil vih (bckp = "1") (bckp = "0") figure 10. audio interface timing (pll slave mode, dsp mode; msbs = 1) asahi kasei [ak4633] ms0447-e-03 2006/04 - 23 - 1/fclk mcki tclkh tclkl vih vil 1/ffck fck vih vil tbck bick tbckh tbckl vih vil tfckh tfckl figure 11. clock timing (ext slave mode) fck vih vil tbfck bick vih vil tfsd sdto 50%dvdd tfckb tbsd tsds sdti vil tsdh vih msb figure 12. audio interface timing (pll, ext slave mode & except dsp mode) asahi kasei [ak4633] ms0447-e-03 2006/04 - 24 - csn vih vil tcss cclk tcds vih vil cdti vih tcckh tcckl tcdh vil c1 c0 r/w tcck figure 13. write command input timing csn vih vil tcsh cclk vih vil cdti vih tcsw vil d1 d0 d2 figure 14. write data input timing asahi kasei [ak4633] ms0447-e-03 2006/04 - 25 - csn cclk 50% dvdd cdti vih d3 d2 d1 d0 tccz tdcd vil vih vil figure 15 . read data output timing pmadc tpdv sdto 50%dvdd bit figure 16. power down & reset timing 1 tpd pdn vil figure 17. power down & reset timing 2 asahi kasei [ak4633] ms0447-e-03 2006/04 - 26 - operation overview ? system clock there are the following four clock modes to interface with external devices (table 1 and table 2). mode pmpll bit m/s bit pll3-0 bit figure pll master mode 1 1 table 4 figure 18 pll slave mode 1 (pll reference clock: mcki pin) 1 0 table 4 figure 19 pll slave mode 2 (pll reference clock: fck or bick pin) 1 0 table 4 figure 20 ext slave mode 0 0 x figure 21 ext master mode 0 1 x figure 22 table 1. clock mode setting (x: don?t care) mode mcko bit mcko pin mcki pin bick pin fck pin 0 ? l ? output pll master mode 1 256fs output master clock input for pll (note 27) 16fs/32fs/64fs output 1fs output 0 ? l ? output pll slave mode 1 (pll reference clock: mcki pin) 1 256fs output master clock input for pll (note 27) 16fs/32fs/64fs input 1fs input pll slave mode 2 (pll reference clock: fck or bick pin) 0 ? l ? output gnd 16fs/32fs/64fs input 1fs input ext slave mode 0 ? l ? output 256fs/ 512fs/ 1024fs input 32fs input 1fs input ext master mode 0 ? l ? output 256fs/ 512fs/ 1024fs input 32fs/64fs output 1fs output note 27. 11.2896mhz/12mhz/12.288mhz/13.5mhz/24mhz/27mhz table 2. clock pins state in clock modes asahi kasei [ak4633] ms0447-e-03 2006/04 - 27 - ? master mode/slave mode the m/s bit selects either mast er or slave modes. m/s bit = ? 1 ? selects master mode and ? 0 ? selects slave mode. when the ak4633 is power-down mode (pdn pin = ? l ? ) and exits reset state, the ak4633 is slave mode. after exiting reset state, the ak4633 goes master mode by changing m/s bit = ? 1 ? . when the ak4633 is used by master mode, fck and bick pins are a floating state until m/s bit becomes ? 1 ? . fck and bick pins of the ak4633 should be pulled-down or pulled-up by about 100k ? resistor externally to avoid the floating state. m/s bit mode 0 slave mode default 1 master mode table 3. select master/salve mode ? pll mode when pmpll bit is ? 1 ? , a fully integrated analog phase locked loop (pll) generates a clock that is selected by the pll3-0 and fs3-0 bits. the pll lock time is shown in table 4, whenever the ak4633 is supplied to a stable clocks after pll is powered-up (pmpll bit = ? 0 ? ? 1 ? ) or sampling frequency changes. 1) setting of pll mode r and c of vcoc pin(note 28) mode pll3 bit pll2 bit pll1 bit pll0 bit pll reference clock input pin input frequency r[ ? ] c[f] pll lock time (max) 0 0 0 0 0 fck pin 1fs 6.8k 220n 160ms default 1 0 0 0 1 bick pin 16fs 10k 4.7n 2ms 2 0 0 1 0 bick pin 32fs 10k 4.7n 2ms 3 0 0 1 1 bick pin 64fs 10k 4.7n 2ms 4 0 1 0 0 mcki pin 11.2896mhz 10k 4.7n 40ms 5 0 1 0 1 mcki pin 12.288mhz 10k 4.7n 40ms 6 0 1 1 0 mcki pin 12mhz 10k 4.7n 40ms 7 0 1 1 1 mcki pin 24mhz 10k 4.7n 40ms 12 1 1 0 0 mcki pin 13.5mhz 10k 10n 40ms 13 1 1 0 1 mcki pin 27mhz 10k 10n 40ms others others n/a note 28. the tolerance of r is 5%, c is 30%. table 4. setting of pll mode (*fs: sampling frequency) 2) setting of sampling frequency in pll mode. when pll2 bit is ? 1 ? (pll reference clock input is mcki pin), the sampling frequency is selected by fs2-0 bits as defined in table 5. mode fs3 bit fs2 bit fs1 bit fs0 bit sampling frequency 0 0 0 0 0 8khz default 1 0 0 0 1 12khz 2 0 0 1 0 16khz 3 0 0 1 1 24khz 4 0 1 0 0 7.35khz 5 0 1 0 1 11.025khz 6 0 1 1 0 14.7khz 7 0 1 1 1 22.05khz 10 1 0 1 0 32khz 11 1 0 1 1 48khz 14 1 1 1 0 29.4khz 15 1 1 1 1 44.1khz others others n/a table 5. setting of sampling frequency at pll2 bit = ? 1 ? and pmpll bit = ? 1 ? asahi kasei [ak4633] ms0447-e-03 2006/04 - 28 - when pll2 bit is ? 0 ? (pll reference clock input is fck or bick pin), the sampling frequency is selected by fs3-2 bits (table 6). mode fs3 bit fs2 bit fs1 bit fs0 bit sampling frequency range 0 0 0 don?t care don?t care 7.35khz fs 12khz default 1 0 1 don?t care don?t care 12khz < fs 24khz 2 1 0 don?t care don?t care 24khz < fs 48khz others others n/a table 6. setting of sampling frequency at pll2 bit = ? 0 ? and pmpll bit = ? 1 ? ? pll unlock state 1) pll master mode (pmpll bit = ? 1 ? , m/s bit = ? 1 ? ) in this mode, after pmpll bit = ? 0 ? ? ? 1 ? and until pll locked , ? l ? are output from bick and fck pins and invalid frequency clock is output from mcko pin when mcko bit is ? 1 ? . if mcko bit is ? 0 ? , ? l ? is output from mcko pin. ( table 7) in case that sampling frequency is changed, setting pmpll bit to ? 0 ? once a time could be prevent bick and fck pins output to ? l ? from unstable clocks. mcko pin pll state mcko bit = ? 0 ? mcko bit = ? 1 ? bick pin fck pin after that pmpll bit ? 0 ? ? ? 1 ? ? l ? output invalid invalid invalid pll unlock ? l ? output invalid ? l ? output ? l ? output pll lock ? l ? output 256fs output see table 9 1fs output table 7. clock operation at pll master mode (pmpll bit = ? 1 ? , m/s bit = ? 1 ? ) 2) pll slave mode (pmpll bit = ? 1 ? , m/s bit = ? 0 ? ) in this mode, an invalid clock is output from mcko pin after pmpll bit = ? 0 ? ? ? 1 ? or sampling frequency is changed. after that, 256fs clock is output from mcko pin while pll is locked. however, the normal data couldn?t output from adc and dac while pll is unloc ked. for dac, the out put signal should be muted by setting ? 0 ? to daca and dacm bits in addr=02h. mcko pin pll state mcko bit = ? 0 ? mcko bit = ? 1 ? after that pmpll bit ? 0 ? ? ? 1 ? ? l ? output invalid pll unlock ? l ? output invalid pll lock ? l ? output 256fs output table 8. clock operation at pll slave mode (pmpll bit = ? 1 ? , m/s bit = ? 0 ? ) asahi kasei [ak4633] ms0447-e-03 2006/04 - 29 - ? pll master mode (pmpll bi t = ?1?, m/s bit = ?1?) when an external clock (11.2896mhz, 12mhz , 12.288mhz, 13.5mhz, 24mhz or 27mhz) is input to mcki pin, the mcko, bick and fck clocks are generated by an internal pll circuit. the mcko output frequency is fixed to 256fs, the output is enabled by mcko bit. the bick is selected among 16fs, 32fs or 64fs, by bcko1-0 bits (table 9). as the dsp mode, the fck pin is output as 50% duty or 1 bick period high output by fck bit (note 11). in addition to dsp mode, fck bit should be set to ? 0 ? . when bick output frequency is 16fs, the audio in terface format supports only mode 0 (dsp mode). ak4633 dsp or p mcko bick fck sdto sdti bclk fck sdti sdto mcki 1fs 16fs, 32fs, 64fs 256fs 11.2896m hz, 12m hz, 12.288mhz 13.5m hz, 24mhz, 27m hz mclk figure 18. pll master mode mode bcko1 bcko0 bick output frequency 0 0 0 16fs default 1 0 1 32fs 2 1 0 64fs 3 1 1 n/a table 9. bick output frequency at pll master mode mode fcko fck output 0 0 duty = 50% default 1 1 high width = 1/fbck fbck is the output frequency of bick table 10. fck output at pll master mode and dsp mode asahi kasei [ak4633] ms0447-e-03 2006/04 - 30 - ? pll slave mode (pmpll bit = ?1?, m/s bit = ?0?) a reference clock of pll is selected among the input clocks to mcki, bick or fck pin. the required clock to the ak4633 is generated by an internal pll circuit. input frequency is selected by pll3-0 bits. when bick input frequency is 16fs, the audio interface format supports only mode 0(dsp mode). a) pll reference clock: mcki pin bick and fck inputs should be synchronized with mcko output. the phase between mcko and fck dose not matter. sampling frequency can be selected by fs3-0 bits(table 5). a k4633 dsp or p mcko bick fck sdto sdti bclk fck sdti sdto mcki 1fs 16fs, 32fs, 64fs 256fs 11.2896mhz, 12mhz, 12.288mhz 13.5mhz, 24mhz, 27mhz mclk figure 19. pll slave mode1 (pll reference clock: mcki pin) b) pll reference cloc k: bick or fck pin in case of using bick or fck as pll reference clock, the sampling frequency corresponds to 7.35khz to 48khz by fs3-0 bits(table 6). a k4633 dsp or p mcki bick fck sdto sdti bclk fck sdti sdto mcko 1fs 16fs, 32fs, 64fs figure 20. pll slave mode 1 (pll reference clock: fck or bick pin) the external clocks (mcki, bick and fck) should always be present whenever the adc or dac or programmable filter are in operation (pmadc bit = ? 1 ? or pmdac bit = ? 1 ? or pmpfil bit = ? 1 ? ). if these clocks are not provided, the ak4633 may draw excess current and it is not possible to operate properly beca use utilizes dynamic refreshed logic internally. if the external clocks are not present, the adc, dac and programmable filter should be in the power-down mode (pmadc bit =pmdac bit = pmpfil bit = ? 0 ? ). asahi kasei [ak4633] ms0447-e-03 2006/04 - 31 - ? ext slave mode (pmpll bit = ?0?, m/s bit = ?0?) when pmpll bit is ? 0 ? and m/s bit is ? 0 ? , the ak4633 becomes ext slave mode. master clock is input from mcki pin, the internal pll circuit is not operated. this mode is compatible with i/f of the normal audio codec. the clocks required to operate are mcki (256fs, 512fs or 1024fs), bick ( 32fs) and fck (fs). the master clock (mcki) should be synchronized with fck. the phase between these clocks does not matter. the input frequency of mcki is selected by fs3-0 bits ( table 11). mode fs3-2 bits fs1 bit fs0 bit mcki input frequency sampling frequency range 0 don?t care 0 0 256fs 7.35khz fs 48khz default 1 don?t care 0 1 1024fs 7.35khz < fs 13khz 2 don?t care 1 0 512s 7.35khz < fs 26khz 3 don?t care 1 1 256fs 7.35khz < fs 48khz table 11. setting mcki frequency at ext slave mode (pmpll bit = ? 0 ? , m/s bit = ? 0 ? ) external slave mode does not support mode 0 (dsp mode) of audio interface format. the s/n of the dac at low sampling frequencies is worse than at high sampling frequencies due to out-of-band noise. when the out-of-band noise can be improved by using higher fr equency of the master clock. the s/n of the dac output through aout amp at fs=8khz is shown in table 12. mcki s/n (fs=8khz, 20khzlpf + a-weighted) 256fs 84db 512fs 92db 1024fs 92db table 12. relationship between mcki and s/n of aout the external clocks (mcki, bick and fck) should always be present whenever the adc or dac or programmable filter are in operation (pmadc bit = ? 1 ? or pmdac bit = ? 1 ? or pmpfil bit = ? 1 ? ). if these clocks are not provided, the ak4633 may draw excess current and it is not possible to operate properly beca use utilizes dynamic refreshed logic internally. if the external clocks are not present, the adc, dac and programmable filter should be in the power-down mode (pmadc bit =pmdac bit = pmpfil bit = ? 0 ? ). a k4633 dsp or p mcki bick fck sdto sdti bclk fck sdti sdto mcko 1fs 32fs, 64fs mclk 256fs, 512fs or 1024fs figure 21. ext slave mode asahi kasei [ak4633] ms0447-e-03 2006/04 - 32 - ? ext master mode (pmpll bit = ?0?, m/s bit = ?1?) when pmpll bit is ? 0 ? and m/s bit is ? 1 ? , the ak4633 becomes clock master mode(ext master mode). master clock is input from mcki pin, the internal pll circuit is not operate d. the clock required to operate is mcki (256fs, 512fs or 1024fs). the input frequency of mcki is selected by fs3-0 bits (table 11). the output frequency of bick is selected to 32fs or 64fs by setting bcko1-0 bit (table 14). fck bit should be set to ? 0 ? . mode fs3-2 bits fs1 bit fs0 bit mcki input frequency sampling frequency range 0 don?t care 0 0 256fs 7.35khz fs 48khz default 1 don?t care 0 1 1024fs 7.35khz < fs 13khz 2 don?t care 1 0 512s 7.35khz < fs 26khz 3 don?t care 1 1 256fs 7.35khz < fs 48khz table 13. setting mcki frequency at ext slave mode (pmpll bit = ? 0 ? , m/s bit = ? 1 ? ) external master mode does not support mode 0 (dsp mode) of audi o interface format. mcki should always be present whenever the adc or dac or programmable filter is in operation (pmadc bit = ? 1 ? or pmdac bit = ? 1 ? or pmpfil bit = ? 1 ? ). if mcki is not provided, the ak4633 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshe d logic internally. if mcki is not present, the adc, dac and programmable filter should be in the power-down mode (pmadc bit =pmdac bit = pmpfil bit = ? 0 ? ). a k4633 dsp or p mcki bick fck sdto sdti bclk fck sdti sdto mcko 1fs 32fs, 64fs mclk 256fs, 512fs or 1024fs figure 22. ext master mode mode bcko1 bcko0 bick output frequency 0 0 0 n/a default 1 0 1 32fs 2 1 0 64fs 3 1 1 n/a table 14. bick output frequency at ext master mode asahi kasei [ak4633] ms0447-e-03 2006/04 - 33 - ? audio interface format four types of data formats are available and are selected by setting the dif1-0 bits (table 15). in all modes, the serial data is msb first, 2?s complement format. audio interface formats can be used in both master and slave modes. fck and bick are output from ak4633 in master mode, but must be input to ak4633 in slave mode. in mode 1-3, the sdto is clocked out on the falling edge of bick and the sdti is latched on the rising edge. mode dif1 dif0 sdto (adc) sdti (dac) bick figure 0 0 0 dsp mode dsp mode 16fs table 16 1 0 1 msb justified lsb justified 32fs figure 23 2 1 0 msb justified msb justified 32fs figure 24 default 3 1 1 i 2 s compatible i 2 s compatible 32fs figure 25 table 15. audio interface format in mode0 (dsp mode), the audio i/f timing is changed by bckp and msbs bits. when bckp bit is ? 0 ? , sdto data is output by rising edge of bick, sdti data is latched by falling edge of bick. when bckp bit is ? 1 ? , sdto data is output by falling edge of bick, sdti data is latched by rising edge of bick. msb data position of sdto and sdti can be shifted by msbs bit. the shifted period is a half of bick. msbs bit bckp bit audio interface format 0 0 figure 26 default 0 1 figure 27 1 0 figure 28 1 1 figure 29 table 16. audio interface format in mode 0 if 16-bit data that adc outputs is converted to 8-bit data by removing lsb 8-bit, ? ? 1 ? at 16bit data is converted to ? ? 1 ? at 8-bit data. and when the dac playbacks this 8-bit data, ? ? 1 ? at 8-bit data will be converted to ? ? 256 ? at 16-bit data and this is a large offset. this offset can be removed by adding the offset of ? 128 ? to 16-bit data before converting to 8-bit data. fck bick(32fs) sdto(o) 0 1 2 8 9 10 12 13 15 0 1 2 8 9 10 12 13 15 0 15 1 14 4 8 7 6 0 32 11 1 4 1 5 14 11 15 bick(64fs) sdto(o) 0 1 2 3 14 15 17 18 31 0 1 2 14 15 17 18 31 0 15 1 14 0 15 sdti(i) 10 15 14 15:msb, 0:lsb data 1/fs don?t care 2 1 13 don?t care 16 16 3 3 13 3 15 14 4 7 6 0 321 5 15 13 sdti(i) don?t care figure 23. mode 1 timing asahi kasei [ak4633] ms0447-e-03 2006/04 - 34 - fck bick(32fs) sdto(o) 0 1 2 8 9 10 12 13 15 0 1 2 8 9 10 12 13 15 0 15 1 14 4 8 7 6 0 32 11 1 4 1 5 14 11 15 13 bick(64fs) sdto(o) 0 1 2 3 14 15 17 18 31 0 1 2 14 14 15 17 18 31 0 15 1 14 0 15 sdti(i) 15:msb, 0:lsb data 1/fs don?t care 2 1 13 don?t care 16 16 3 13 15 14 2 1 13 0 15 sdti(i) 15 14 4 8 7 6 0 321 5 15 don?t care figure 24. mode 2 timing fck bick(32fs) sdto(o) 0 1 2 4 9 10 12 13 15 0 1 2 4 9 10 12 13 15 0 1 15 5 13 7 7 1 43 11 1 4 2 6 0 14 11 13 bick(64fs) sdto(o) 0 1 2 3 14 15 17 18 31 0 1 2 4 14 15 17 18 31 0 1 15 0 sdti(i) 15:msb, 0:lsb data 1/fs don?t care 2 1 14 don?t care 16 16 3 13 15 2 1 14 0 14 3 3 4 sdti(i) 15 5 13 7 1 432 6 0 14 figure 25. mode 3 timing asahi kasei [ak4633] ms0447-e-03 2006/04 - 35 - fck bick ( 16fs ) sdto(o) 15 0 1 8 8 9 11 12 14 15 0 1 8 8 9 11 12 14 15 0 0 15 5 8 8 7 1 43 10 13 2 6 0 15 5 887 1 4 3 2 6 13 10 0 2 14 14 2 0 15 5 8 7 1 432 6 0 15 5 87 1 4 3 2 60 14 14 sdti(i) bick ( 32fs ) sdto(o) 15 0 1 8 14 15 17 18 30 31 0 1 8 8 9 11 12 30 31 0 15 8 2 1 16 29 0 15 821 0 13 10 15:msb, 0:lsb 1/fs 2 14 14 2 15 2 1 0 15 8210 14 14 sdti(i) 1/fs don?t care don?t care figure 26. mode 0 timing (bckp = ? 0 ? , msbs = ? 0 ? ) fck bick ( 16fs ) sdto(o) 15 0 1 8 8 9 11 12 14 15 0 1 8 8 9 11 12 14 15 0 0 15 5 8 8 7 1 43 10 13 2 6 0 15 5 887 1 4 3 2 6 13 10 0 2 14 14 2 0 15 5 8 7 1 432 6 0 15 5 87 1 4 3 2 60 14 14 sdti(i) bick ( 32fs ) sdto(o) 15 0 1 8 14 15 17 18 30 31 0 1 8 8 9 11 12 30 31 0 15 8 2 1 16 29 0 15 821 0 13 10 15:msb, 0:lsb 1/fs 2 14 14 2 15 2 1 0 15 8210 14 14 sdti(i) 1/fs don?t care don?t care figure 27. mode 0 timing (bckp = ? 1 ? , msbs = ? 0 ? ) asahi kasei [ak4633] ms0447-e-03 2006/04 - 36 - fck bick ( 16fs ) sdto(o) 15 0 1 8 8 9 11 12 14 15 0 1 8 8 9 11 12 14 15 0 0 15 5 8 8 7 1 43 10 13 2 6 0 15 5 887 1 4 3 2 6 13 10 0 2 14 14 2 0 15 5 8 7 1 432 6 0 15 5 87 1 4 3 2 60 14 14 sdti(i) bick ( 32fs ) sdto(o) 15 0 1 8 14 15 17 18 30 31 0 1 8 8 9 11 12 30 31 0 15 8 2 1 16 29 0 15 821 0 13 10 15:msb, 0:lsb 1/fs 2 14 14 2 15 2 1 0 15 8210 14 14 sdti(i) 1/fs don?t care don?t care figure 28. mode 0 timing (bckp = ? 0 ? , msbs = ? 1 ? ) fck bick ( 16fs ) sdto(o) 15 0 1 8 8 9 11 12 14 15 0 1 8 8 9 11 12 14 15 0 0 15 5 8 8 7 1 43 10 13 2 6 0 15 5 887 1 4 3 2 6 13 10 0 2 14 14 2 0 15 5 8 7 1 432 6 0 15 5 87 1 4 3 2 60 14 14 sdti(i) bick ( 32fs ) sdto(o) 15 0 1 8 14 15 17 18 30 31 0 1 8 8 9 11 12 30 31 0 15 8 2 1 16 29 0 15 821 0 13 10 15:msb, 0:lsb 1/fs 2 14 14 2 15 2 1 0 15 8210 14 14 sdti(i) 1/fs don?t care don?t care figure 29. mode 0 timing (bckp = ? 1 ? , msbs = ? 1 ? ) asahi kasei [ak4633] ms0447-e-03 2006/04 - 37 - ? system reset upon power-up, reset the ak4633 by bringing the pdn pin = ? l ? . this ensures that all intern al registers reset to their initial values. the adc enters an initialization cycle that starts when the pmadc bit is changed from ? 0 ? to ? 1 ? . the initialization cycle time is selected by adrst bit (table 17). during the initialization cycle, the adc digital data outputs of both channels are forced to a 2's compliment, ? 0 ? . the adc output reflects the analog input signal after the initialization cycle is complete. the dac does not require an initialization cycle. (note) the initial data of adc has the offset data that depends on the condition of the microphone and the cut-off frequency of hpf. if this offset isn?t small, the longer initialization cycle should be selected as adrstbit= ? 0 ? in order to prevent the offset data. or, do not use the initial data of adc. init cycle adrst bit cycle fs = 8khz fs = 16khz fs = 48khz 0 1059/fs 132.4ms 66.2ms 22.1ms 1 291/fs 36.4ms 18.2ms 6.1ms table 17. initialization cycle of adc ? mic gain amplifier the ak4633 has a gain amplifier for microphone input. this gain is selected by mgain2-0 bits. the typical input impedance is 30k ? . mgain2 bit mgain1 bit mgain0 bit input gain 0 0 0 0db 0 0 1 +20db default 0 1 0 +26db 0 1 1 +32db 1 0 0 +6db 1 0 1 +10db 1 1 0 +14db 1 1 1 +17db table 18. input gain asahi kasei [ak4633] ms0447-e-03 2006/04 - 38 - ? mic power the mpi pin supplies power for the microphone. this output voltage scales with 0.8 x avdd (typ) and the load resistance is minimum 2k ? . don?t connect the capacitor directly to mpi pin mic pin mpi pin ak4633 mic-amp 2k hpf a/d mic-power bick pin fck pin stdo pin audio i/f figure 30. mic block circuit ? mic differential input the mic input becomes an differential input when mdif bit is ? 1 ? . the input pins are mic and micp pins. at this time, the micp pin couldn?t be used for an beep input. when mdif bit is ? 1 ? , the pmbp, beepa and beeps bits should be set to ? 0 ? . micp pin micn pin mpi pin a k4633 mic-amp 1k 1k hpf a/d mic-power bick pin fck pin stdo pin audio i/f figure 31. mic differential input circuit asahi kasei [ak4633] ms0447-e-03 2006/04 - 39 - ? digital block digital block is composed as figure 32.the recording and playback single paths are selected by adcpf bit, pfdac bit and pfsdo bit (figure 32~ figure 35, table 19) dac 1st order hpf adc alc (volume) datt smute sdti a dcpf bit ?1? ?0? 2 band eq 1st order hpf pfdac bit ?1? ?0? pfsdo bit ?0? ?1? sdto hpf bit eq2-1 bits hpfad bit pmpfil bit pmdac bit pmadc bit (1) adc : include the digital filter(lpf) for adc as shown in ? filter chracteristics ? . (2) dac : include the digital filter(lpf) for dac as shown in ? filter chracteristics ? . (3) hpf : high pass filter. enable to use for a wind-noise reduction filter. (see ? programmable filter ? ) (4) eq : using for an equalizer or notch filter. (see ? programmable filter ? ) (5) volume : digital volume with alc function. (see ? digital volume ? or ? alc ? ) (6) datt : 4 steps digital volume for playback path.( see ? output digital volume2 ? ) (7) smute : soft mute. figure 32. digital block path asahi kasei [ak4633] ms0447-e-03 2006/04 - 40 - mode adcpf bit pfdac bit pfsdo bit figure recoding main mode 1 0 1 figure 33 playback main mode 0 1 0 figure 34 loop back mode 1 1 1 figure 35 table 19. recode/playback mode dac 2nd order hpf adc 2 band eq alc (volume) datt smute figure 33. the path at adcpf bit = ? 1 ? , pfdac bit = ? 0 ? and pfsdo bit = ? 1 ? (default) dac 1st order hpf adc datt smute alc (volume) 2 band eq 1st order hpf figure 34. the path at adcpf bit = ? 0 ? , pfdac bit = ? 1 ? and pfsdo bit = ? 0 ? dac 2nd order hpf adc 2 band eq alc (volume) datt smute figure 35. the path at adcpf bit = ? 1 ? , pfdac bit = ? 1 ? and pfsdo bit = ? 1 ? asahi kasei [ak4633] ms0447-e-03 2006/04 - 41 - ? digital programmable filter the ak4633 have 2steps of 1st order hpf and 2 band equalizer for recording and playback path (figure 32). (1) high pass filter (hpf) normally, this hpf is used for a wind-noise reduction filter. this is composed with 2 steps of 1st order hpf. the coefficient of both hpf is same and should be set by f1a13-0 bits and f1b13-0 bits. the hpf of adc could be on/off by hpfad bit, and the hpf before 2 band eq could be on/off by setting hpf bit. when the hpf is off, the audio data passes this block by 0db . the coefficient should be set when hpfad bit = hpf bit = ? 0 ? or pmadc bit = pmpfil bit = ? 0 ? . after changing the coefficient, the hpf starts with 3/fs (max) delay time after (hpfad bit and pmadc bit) or (hpf bit and pmpfil bit) are set to ? 1 ? . the waiting time is not necessity for setting hpfad bit, hpf bit, pmadc bit and pmpfil bit to ? 1 ? after setting the coefficient. fs: sampling frequency fc: cut-off frequency register setting (note 29) hpf: f1a[13:0] bits =a, f1b[13:0] bits =b (msb=f1a13, f1b13; lsb=f1a0, f1b0) a = 1 1 + tan ( fc/fs) b = 1 ? tan ( fc/fs) 1 + tan ( fc/fs) , the cut-off frequency should be set as below. fc/fs 0.0001 (fc min = 1.6hz at 16khz) (2) 2 band equalizer this could be used as equalizer or notch filter. 2 band equalizer (eq1 and eq2) are on/off independently by eq1 bit and eq2 bit. when equalizer is off, the audio data passes this block by 0db. the coefficient of eq1 should be set by e1a15-0 bits, e1b15-0 bits and e1c15-0 bits, the coefficien t of eq2 should be set by e2a15-0 bits, e2b15-0 bits and e2c15-0 bits. the eq1 coefficient should be set when eq1 bit = ? 0 ? or pmpfil bit = ? 0 ? , the eq2 coefficient should be set when eq2 bit = ? 0 ? or pmpfil bit = ? 0 ? . after changing the coefficient, the equalizer starts with 3/fs (max) delay time after (eq1 bit and pmpfil bit) or (eq2 bit and pmpfil bit) are set to ? 1 ? . the waiting time is not necessity for setting eq1 bit, eq2 bit and pmpfil bit to ? 1 ? after setting the coefficient. fs: sampling frequency fo: center frequency fb: band width of 3db gain difference from center frequency k : gain ( -1 k < 3 ) register setting(note 29) eq1: e1a[15:0] bits =a, e1b[15: 0] bits =b, e1c[15:0] bits =c eq2: e2a[15:0] bits =a, e2b[15: 0] bits =b, e2c[15:0] bits =c (msb=e1a15, e1b15, e1c15, e2a15, e2b15, e2c 15 ; lsb= e1a0, e1b0, e1c0, e2a0, e2b0, e2c0) a = k x tan ( fb/fs) 1 + tan ( fb/fs) b = cos(2 fo/fs) x 2 1 + tan ( fb/fs) , c = 1 ? tan ( fb/fs) 1 + tan ( fb/fs) , ? the center frequency should be set as below. fo/fs < 0.497 asahi kasei [ak4633] ms0447-e-03 2006/04 - 42 - when the gain of k is set to ? -1 ? , these equalizers work as notch filter. if the difference between two center frequencies of these notch filters is small, the center frequency wi ll differ from the frequency that is calculated by th e above equation. then, the difference between the actual two center frequencies is smaller that the difference between the two calculated center frequencies. it is required to adjust the center fre quencies when these are calculated. the frequency response can be confirmed by the control soft that is attached in the demo board kit. if the two center frequencies are near, the actual center frequencies should be confirmed by this software. e.g.) sampling frequency = 44.1khz, the center frequencies of 2 band notch f itters are 6000hz and 6500hz, and the band width is 200hz. when the coefficients that are calculated by fo = 6000hz and 6500hz is used, the actual center frequencies are 6017hz and 6476hz. when the coefficients that are calculated by fo = 5984hz and 6522hz is used, the actual center frequencies are 6000hz and 6500hz. note 29. [changing real number to binary number for the filter coefficient setting upon is as below] x=( the real filter coefficient setting upon) x 2 13 round off the x value to the decimal point and change it to binary number. the msb bit of each filter coefficient setting register is a sign bit. ? input digital volume (manual mode) when adcpf bit = ? 1 ? and alc1 bit = ? 0 ? , alc block becomes an input digital volume (manual mode). the digital volume?s gain is set by ivol7-0 bits as shown in table 20. the ivol7-0 bits value are reflected to this input volume at zero cross or zero cross time out. the zero crossing timeout period is set by ztm1-0 bits. ivol7-0bits gain(0db) step f1h +36.0 f0h +35.625 efh +35.25 : : 92h +0.375 91h 0.0 default 90h -0.375 : : 0.375db 2h -53.625 1h -54.0 0h mute table 20. input digital volume setting when writing to the ivol7-0 bits continually, the control register should be written by an interval more than zero crossing timeout. if not, zero crossing counter could be reset at each time and volume is not be changed. however, it could be ignored when writing a same register value as the last time. at this time, zero crossing counter has not been reset, so it should be written by an interval less than zero crossing timeout. asahi kasei [ak4633] ms0447-e-03 2006/04 - 43 - ? output digital volume (manual mode) when adcpf bit = ? 0 ? and alc2 bit = ? 0 ? , alc block become an output digital volume (manual mode). the digital volume?s gain is set by ovol7-0 bits as shown in table 21. the ovol7-0 bits value are reflected to this output volume at zero cross or zero cross time out. the zero crossing timeout period is set by ztm1-0 bits. ovol7-0bits gain(0db) step f1h +36.0 f0h +35.625 efh +35.25 : : 92h +0.375 91h 0.0 default 90h -0.375 : : 0.375db 2h -53.625 1h -54.0 0h mute table 21. output digital volume setting when writing to the ovol7-0 bits continually, the control register should be written by an interval more than zero crossing timeout. if not, zero crossing counter could be reset at each time and volume is not be changed. however, it could be ignored when writing a same register value as the last time. at this time, zero crossing counter has not been reset, so it should be written by an interv al less than zero crossing timeout. ? output digital volume2 ak4633 has 4 steps output volume in addition to the volume setting by ovol7-0 bits. this volume is set by datt1-0 bits as shown in table 22. datt1-0bits gain(0db) step 0h 0.0 default 1h -6.0 2h -12.0 6.0db 3h -18.1 table 22. output digital volume2 setting asahi kasei [ak4633] ms0447-e-03 2006/04 - 44 - ? alc operation alc operation works in alc block. when adcpf bit = ? 1 ? , alc operation is enable for recording path. when adcpf bit = ? 0 ? , alc operation is enable for playback path. the on/off of alc operation for recording is controlled by alc1 bit and the on/off of alc operation for playback is controlled by alc2 bit. 1. alc limiter operation when the alc limiter is enabled, and output exceeds the alc limiter detection level (table 23), the volume value is attenuated by the amount defined in lmat1-0 bits(table 24) automatically. when the zelmn bit = ? 0 ? (zero crossing detection valid), the vol value is changed by alc limiter operation at the zero crossing point or zero crossing timeout. zero crossing timeout period is set by ztm1-0 bit that in common with alc recovery zero crossing timeout period?s setting (table 25). when the zelmn bit = ? 1 ? (zero crossing detection invalid), vol value has been changed immediately (period: 1/fs) by alc limiter operation. the attenuation for limiter operation is fixed to 1 step and not controlled by setting lmat1-0 bits. after finishing the attenuation operation, if alc bit does not change to ? 0 ? , the operation repeats when the output signal level exceeds the alc limiter detection level. lmth1 lmth0 alc limiter detection level alc recovery waiting counter reset level 0 0 alc output ? 2.5dbfs ? 2.5dbfs > alc output ? 4.1dbfs 0 1 alc output ? 4.1dbfs ? 4.1dbfs > alc output ? 6.0dbfs default 1 0 alc output ? 6.0dbfs ? 6.0dbfs > alc output ? 8.5dbfs 1 1 alc output ? 8.5dbfs ? 8.5dbfs > alc output ? 12dbfs table 23. alc limiter detection level / recovery waiting counter reset level alc1 limiter att step lmat1 lmat0 alc1 output lmth alc1 output fs alc1 output fs + 6db alc1 output fs + 12db 0 0 1 1 1 1 default 0 1 2 2 2 2 1 0 2 4 4 8 1 1 1 2 4 8 table 24. alc limiter att step setting zero crossing timeout period ztm1 ztm0 8khz 16khz 44.1khz 0 0 128/fs 16ms 8ms 2.9ms default 0 1 256/fs 32ms 16ms 5.8ms 1 0 512/fs 64ms 32ms 11.6ms 1 1 1024/fs 128ms 64ms 23.2ms table 25. alc zero crossing timeout period setting asahi kasei [ak4633] ms0447-e-03 2006/04 - 45 - 2. alc recovery operation the alc recovery operation waits for the wtm1-0 bits(table 26) to be set after completing the alc limiter operation. if the input signal does not exceed ? alc recovery waiting counter reset level ? (table 23) during the wait time, the alc recovery operation is done. the vol value is automatically incremented by rgain1-0 bits (table 27) up to the set reference level(table 28, table 29) with zero crossing detection which timeout period is set by ztm1-0 bits (table 25). the alc recovery operation is done at a period set by wtm1-0 bits. for example, when the current vol value is 30h and rgain1-0 bits are set to ? 01 ? (2 steps), vol is changed to 32h by the auto limiter operation and then the input signal level is gained by 0.75db (=0.375db x 2). when the vol value exceeds the reference level (iref7-0 or oref5-0), the vol values are not increased. when ? alc recovery waiting counter reset level (lmth1-0) output signal < alc limiter detection level (lmth1-0) ? during the alc recovery operation, the waiting timer of alc recovery operation is reset. when ? alc recovery waiting counter reset level (lmth1-0) > output signal ? , the waiting timer of alc recovery operation starts. the alc operation corresponds to the impulse noise. when the impulse noise is input, the alc recovery operation becomes faster than a normal recovery operation. when large noise is input to microphone instantaneously, the quality of small level in the large noise can be improved by this fast recovery operation. the speed of first recovery operation is set by rfst1-0 bits(table 30). alc recovery operation waiting period wtm1 wtm0 8khz 16khz 44.1khz 0 0 128/fs 16ms 8ms 2.9ms default 0 1 256/fs 32ms 16ms 5.8ms 1 0 512/fs 64ms 32ms 11.6ms 1 1 1024/fs 128ms 64ms 23.2ms table 26. alc recovery operation waiting period rgain1 rgain0 gain step 0 0 1 0.375db default 0 1 2 0.750db 1 0 3 1.125db 1 1 4 1.500db table 27. alc recovery gain step asahi kasei [ak4633] ms0447-e-03 2006/04 - 46 - iref7-0bits gain(0db) step f1h +36.0 f0h +35.625 efh +35.25 : : c5h +19.5 default : : 92h +0.375 91h 0.0 90h -0.375 : : 0.375db 2h -53.625 1h -54.0 0h mute table 28. reference level at alc recovery operation for recoding oref5-0bits gain(0db) step 3ch +36.0 3bh +34.5 3ah +33.0 : : 28h +6.0 default : : 25h +1.5 24h 0.0 23h -1.5 : : 1.5db 2h -51.0 1h -52.5 0h -54.0 table 29. reference level at alc recovery operation for playback rfst1 bit rfst0 bit recovery speed 0 0 4 times default 0 1 8 times 1 0 16times 1 1 n/a table 30. first recovery speed setting asahi kasei [ak4633] ms0447-e-03 2006/04 - 47 - 3. the volume at the alc operation the current volume value at the alc operation is reflected by vol7-0 bits. it is enable to check the current volume value with reading the register value of vol7-0 bits. vol7-0bits gain(0db) 0eh +36.0 0fh +35.625 10h +35.25 : : 3ah +19.5 : : 6dh +0.375 6eh 0.0 6fh -0.375 : : fdh -53.625 feh -54.0 ffh mute table 31. value of vol7-0 bits 4. example of the alc operation for recording operation table 32 shows the examples of the alc setting for mic recording. fs=8khz fs=16khz register name comment data operation data operation lmth limiter detection level 01 ? 4.1dbfs 01 ? 4.1dbfs zelm limiter zero crossing de tection 0 enable 0 enable ztm1-0 zero crossing timeout period 00 16ms 01 16ms wtm1-0 recovery waiting period *wtm1-0 bits should be the same data as ztm1-0 bits 00 16ms 01 16ms iref7-0 maximum gain at recovery operation c5h 19.5db c5h 19.5db ivol7-0 gain of ivol c5h 19.5db c5h 19.5db lmat1-0 limiter att step 11 1/2/4/8 step 11 1/2/4/8 step rgain1-0 recovery gain step 00 1 step 00 1 step alc alc enable 1 enable 1 enable frsl1-0 speed of fast recovery 00 4 times 10 4times table 32. example of the alc setting (recording) asahi kasei [ak4633] ms0447-e-03 2006/04 - 48 - 5. example of the alc operation for playback operation table 33 shows the examples of the alc setting for playback operation. fs=8khz fs=16khz register name comment data operation data operation lmth limiter detection level 01 ? 4.1dbfs 01 ? 4.1dbfs zelm limiter zero crossing de tection 0 enable 0 enable ztm1-0 zero crossing timeout period 00 16ms 01 16ms wtm1-0 recovery waiting period *wtm1-0 bits should be the same data as ztm1-0 bits 00 16ms 01 16ms oref5-0 maximum gain at recovery operation 28 +6db 28 +6db ovol7-0 gain of ivol 91 0db 91 0db lmat1-0 limiter att step 11 1/2/4/8 step 11 1/2/4/8 step rgain1-0 recovery gain step 00 1 step 00 1 step alc alc enable 1 enable 1 enable frsl1-0 speed of fast recovery 00 4 times 00 4 times table 33. example of the alc setting (playback) asahi kasei [ak4633] ms0447-e-03 2006/04 - 49 - the following registers should not be changed during the alc operation. these bits should be changed after the alc operation is finished by alc1 = alc2 bits = ? 0 ? or pmpfil bit = ? 0 ? . ? lmth, lmat1-0, wtm1-0, ztm 1-0, rgain1-0, iref7-0/oref7-0, zelm, rfst1-0 manual mode wr (ztm1-0, wtm1-0) wr (iref7-0/oref5-0) wr (ivol7-0/ovol7-0) wr (lmat1-0, rgain0, zelmn, lmth0) wr ( alc1= ?1? ) example: limiter = zero crossing enable recovery cycle = 16ms@8khz limiter and recovery step = 1 maximum gain = +19.5db limiter detection level = ? 4.1dbfs alc1 bit = ?1? (1) addr=06h, data=00h (2) addr=08h, data=c5h (5) addr=07h, data=21h (3) addr=09h, data=c5h alc operation wr (rgain1, lmth1,rfst1-0) (4) addr=0bh, data=28h *2 *1 note : wr : write *1: the value of volume at starting should be the same or smaller than ref?s. *2: when setting alc1 bit or alc2 bit to ? 0 ? , the operation is shifted to manual mode after passing the zero crossing time set by ztm1-0 bits. figure 36. registers set-up sequence at alc operation asahi kasei [ak4633] ms0447-e-03 2006/04 - 50 - ? softmute soft mute operation is performed in the digital input domain. when the smute bit goes to ? 1 ? , the input signal is attenuated by ? ( ? 0 ? ) during the cycle of 245/fs (31msec@fs=8khz). when the smute bit is returned to ? 0 ? , the mute is cancelled and the input attenuation gradually changes to 0db during the cycle of 245/fs (31msec@fs=8khz). if the soft mute is cancelled within the cycle of 245/fs (31msec@fs=8khz), the attenuation is discontinued and returned to 0db. the soft mute for playback operation is effective for changing the signal source without stopping the signal transmission. smute bit a ttenuation 245/fs 0db - 245/fs gd gd (1) (2) (3) a nalog output figure 37. soft mute function (1) the input signal is attenuated by ? ( ? 0 ? ) during the cycle of 245/fs (31msec@fs=8khz). (2) analog output corresponding to digital input has the group delay (gd). (3) if the soft mute is cancelled within the cycle of 245/fs (31msec@fs=8khz), the attenuation is discounted and returned to 0db within the same cycle. ? beep input when the pmbp bit is set to ? 1 ? , the beep input is powered-up. when the beeps bit is set to ? 1 ? , the input signal from the beep pin is output to speaker-amp. when the beepa bit is set to ? 1 ? , the input signal from the beep pin is output to the mono line output amplifier. the external resister ri adjusts the signal level of beep input. ? table 34 ? shows the typical gain example at r i = 20k ?. this gain is in inverse proportion to r i it should be set mdif bit to ? 1 ? expect pmbp bit = beepa bit = beeps bit = ? 0 ? . beep - + rf ri figure 38. block diagram of beep pin spkg1-0 bits beep ? spp/spn gain beep ? aout gain 00 +8db 0db 01 +10db 0db 10 +12db 0db 11 +14db 0db table 34. beep input gain at r i = 20k ? asahi kasei [ak4633] ms0447-e-03 2006/04 - 51 - ? mono line output (aout pin) a signal of dac is output from aout pin. when the daca bit is ? 0 ? , this output is off. the load resistance is 10k ? (min). when pmao bit is ? 0 ? and aops bit is ? 0 ? , the mono line output enters power-down and is pulled down by 100 ? (typ). when adps bit is ? 1 ? , the mono line output enters power-save mode. if pmao bit is controlled at aops bit = ? 1 ? , pop noise will be reduced at power-up and down. then, this line should be pulled down by 20k ? of resister after c-coupling shown in figure 39. this rising and falling time is max 300 ms at c=1.0 f . when pmao bit is ? 1 ? and aops bit is ? 0 ? , the mono line output enters power-up state. aout 1 ? ? figure 39. aout external circuit in case of using pop reduction function aout control sequence in case of using pop reduction circuit p m a o bit a ops bit a out pin (1) (2) norm al output (3) (4) (5) (6) 300 m s 300 m s (1) set aops bit = ? 1 ? . mono line output enters the power-save mode. (2) set pmao bit = ? 1 ? . mono line output exits the power-down mode. aout pin rises up to vcom voltage. rise time is 200ms (max 300ms) at c=1 f. (3) set aops bit = ? 0 ? after aout pin rises up. mono line output exits the power-save mode. mono line output is enabled. (4) set aops bit = ? 1 ? . mono line output enters power-save mode. (5) set pmao bit = ? 1 ? . mono line output enters power-down mode. aout pin falls down to avss. fall time is 200ms (max 300ms) at c=1 f. (6) set aops bit = ? 0 ? after aout pin falls down. mono line output exits the power-save mode. figure 40. mono line output control sequence in case of using pop reduction function asahi kasei [ak4633] ms0447-e-03 2006/04 - 52 - ? speaker output the power supply voltage for speaker-amp svdd can be set to from 2.2v to 4.0v. however, svdd should be set to from 2.6v to 3.6v, when 8 ? dynamic speaker is connected. if svdd is more than 3.6v when 8 ? dynamic speaker is connected to the ak4633, the output of speaker-amp shoul d be restricted in consideration of maximum power dissipation. the output signal from dac is input to the speaker-amp. this speaker-amp is a mono output controlled by btl and the gain of speaker-amp is set by spkg1-0 bits. the output voltage depends on avdd and spkg1-0 bits. spkg1-0 bits spk-amp output level[vpp] dac =-4.1dbfs (note 30) gain (note 31) 00 3.17 0db 01 4.00 +2db 10 5.03 +4db 11 6.33 +6db note 30. avdd=3.3v. the output level is proportional to avdd. note 31. the gain with a reference of spkg1-0 bits = ? 00 ? . note 32. the setting of spkg1-0 bits = ? 01 ? is recommend when 8 ? dynamic speaker is connected. the spk-amp power is 250mw at 8 ? load resistance and 4.0vpp output level. table 35. spk-amp output voltage and gain asahi kasei [ak4633] ms0447-e-03 2006/04 - 53 - asahi kasei [ak4633] ms0447-e-03 2006/04 - 54 - ? serial control interface internal registers may be written and read by using the 3-wire p interface pins (csn, cclk and cdti). the data on this interface consists of a 2-bit chip address (2bits, fixed to ? 10 ? ), read/write, register address (msb first, 5bits) and control data (msb first, 8bits). address and data is clocked in on the rising edge of cclk and data is clocked out on the falling edge. it is available for writing the data on the rising edge of csn. when reading operation, cdti pin has become an output mode at the falling edge of 8th cclk and outputs d7-d0. the output finishes on the rising edge of csn. the cdti pin is placed in a hi-z state except outputting data at read operation mode. the clock speed of cclk is 5mhz (max). the value of internal registers is initialized at pdn pin = ? l ? . note 33. it is available for reading the address 00h~0bh and 0dh~0fh. when reading the address 0ch and 10h 1fh, the register values are invalid. csn cclk 0 1 2 345 67891011 12 13 14 15 cdti c1 c0 a 2 a 3 a 1 a 0 a 4 d7d6d5d4d3d2d1d0 r/w c1-c0: chip address (c1 = ?1?, c0 = ?0?); fixed to ?10? r/w: read/write (?1?: write, ?0?: read) a 4-a0: register address d7-d0: control data ?0? ?1? figure 43. serial control i/f timing asahi kasei [ak4633] ms0447-e-03 2006/04 - 55 - ? register map addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management 1 pmpfil pmvcm pmbp pmspk pmao pmdac 0 pmadc 01h power management 2 0 0 0 0 m/s 0 mcko pmpll 02h signal select 1 sppsn beeps dacs daca 0 pmmp mgain2 mgain0 03h signal select 2 pfsdo aops m gain1 spkg1 spkg0 beepa pfdac adcpf 04h mode control 1 pll3 pll2 pl l1 pll0 bcko1 bcko0 dif1 dif0 05h mode control 2 adrst fcko fs3 msbs bckp fs2 fs1 fs0 06h timer select 0 0 ztm1 ztm0 wtm1 wtm0 rfst1 rfst0 07h alc mode control 1 0 alc2 alc1 zelmn lmat1 lmat0 rgain0 lmth0 08h alc mode control 2 iref7 iref6 iref5 iref4 iref3 iref2 iref1 iref0 09h digital volume control ivol7 ivol6 ivol5 ivol4 ivol3 ivol2 ivol1 ivol0 0ah digital volume control ovol7 ovol6 ovol5 ovol4 ovol3 ovol2 ovol1 ovol0 0bh alc mode control 3 rgain1 lmth1 oref5 oref4 oref3 oref2 oref1 oref0 0ch reserved 0 0 0 0 0 0 0 0 0dh alc level vol7 vol6 vol5 vo l4 vol3 vol2 vol1 vol0 0eh signal select 3 datt1 datt0 smute mdif eq2 eq1 hpf hpfad 0fh reserved 0 0 0 0 0 0 0 0 10h e1 co-efficient 0 e1 a7 e1a6 e1a5 e1a4 e1a3 e1a2 e1a1 e1a0 11h e1 co-efficient 1 e1a15 e1a14 e1 a13 e1a12 e1a11 e1 a10 e1a9 e1a8 12h e1 co-efficient 2 e1b7 e1b6 e1 b5 e1b4 e1b3 e1b2 e1b1 e1b0 13h e1 co-efficient 3 e1b15 e1b14 e1 b13 e1b12 e1b11 e1b10 e1b9 e1b8 14h e1 co-efficient 4 e1c7 e1c6 e1 c5 e1c4 e1c3 e1c2 e1c1 e1c0 15h e1 co-efficient 5 e1c15 e1c14 e1 c13 e1c12 e1c11 e1c10 e1c9 e1c8 16h e2 co-efficient 0 e2a7 e2a6 e2 a5 e2a4 e2a3 e2a2 e2a1 e2a0 17h e2 co-efficient 1 e2a15 e2a14 e2 a13 e2a12 e2a11 e2 a10 e2a9 e2a8 18h e2 co-efficient 2 e2b7 e2b6 e2 b5 e2b4 e2b3 e2b2 e2b1 e2b0 19h e2 co-efficient 3 e2b15 e2b14 e2 b13 e2b12 e2b11 e2b10 e2b9 e2b8 1ah e2 co-efficient 4 e2c7 e2c6 e2 c5 e2c4 e2c3 e2c2 e2c1 e2c0 1bh e2 co-efficient 5 e2c15 e2c14 e2 c13 e2c12 e2c11 e2c10 e2c9 e2c8 1ch hpf co-efficient 0 f1a7 f1a6 f1a5 f1a4 f1a3 f1a2 f1a1 f1a0 1dh hpf co-efficient 1 0 0 f1a13 f1a12 f1a11 f1a10 f1a9 f1a8 1eh hpf co-efficient 2 f1b7 f1b6 f1b5 f1b4 f1b3 f1b2 f1b1 f1b0 1fh hpf co-efficient 3 0 0 f1b13 f1b12 f1b11 f1b1 0 f1b9 f1b8 pdn pin = ? l ? resets the registers to their default values. note 34. unused bits must contain a ? 0 ? value. note 35. when reading address 0ch and 10h to 1fh, the values are invalid. note 36. address 0dh is a read only register. writing access to 0dh does not effect the operation. asahi kasei [ak4633] ms0447-e-03 2006/04 - 56 - ? register definitions addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management 1 pmpfil pmvcm pmbp pmspk pmao pmdac 0 pmadc default 0 0 0 0 0 0 0 0 pmadc: adc block power control 0: power down (default) 1: power up when the pmadc bit changes from ? 0 ? to ? 1 ? , the initialization cycle (1059/fs=133ms@8khz when adrst bit = ? 0 ? ) starts. after initializing, digital data of the adc is output. pmdac: dac block power control 0: power down (default) 1: power up pmao: mono line out power control 0: power down (default) 1: power up pmspk: speaker block power control 0: power down (default) 1: power up pmbp: beep in power control 0: power down (default) 1: power up even if pmbp bit is ? 0 ? , the path is still connected between beep and aout/spk-amp. beeps and beepa bits should be set to ? 0 ? to disconnect these paths. pmvcm: vcom block power control 0: power down (default) 1: power up pmpfil: programmable filter block(hpf/2 band eq/alc) control 0: power down (default) 1: power up each block can be powered-down respectively by writing ? 0 ? in each bit. when the pdn pin is ? l ? , all blocks are powered-down. when pmpll and mcko bits and all bits in 00h address are ? 0 ? , all blocks are powered-down. the registers remain unchanged. when any of the blocks are powered-up, the pmvcm bit must be set to ? 1 ? . when pmpll and mcko bits and all bits in 00h address are ? 0 ? , pmvcm bit can write to ? 0 ? . when beep signal is output from speaker-amp (signal path: beep pin ? spp/spn pins) or mono lineout-amp (signal path: beep pin ? aout pin) only, the clocks may not be present. when adc, dac, alc1 or alc2 is in operation, the clocks must always be present. asahi kasei [ak4633] ms0447-e-03 2006/04 - 57 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 01h power management 2 0 0 0 0 m/s 0 mcko pmpll default 0 0 0 0 0 0 0 0 pmpll: pll block power control select 0: pll is power down and external is selected. (default) 1: pll is power up and pll mode is selected. mcko: master clock output enable 0: ? l ? output (default) 1: 256fs output m/s: master/slave mode select 0: slave mode(default) 1: master mode addr register name d7 d6 d5 d4 d3 d2 d1 d0 02h signal select 1 sppsn beeps dacs daca 0 pmmp mgain2 mgain0 default 0 0 0 0 0 0 0 1 mgain2, mgain0: mic-amp gain control (table 18) mgain1 bit is d5 bit of 03h. default: ? 001h ? (+20.0db) pmmp: power supply control for microphone 0: off (default) 1: on when pmadc bit is ? 1 ? , pmmp bit is enabled. daca: switch control from dac to mono line output 0: off (default) 1: on when pmao bit is ? 1 ? , daca bit is enabled. when pmao bit is ? 0 ? , the aout pin go to avss. dacs: switch control from dac to speaker-amp 0: off (default) 1: on when dacs bit is ? 1 ? , dac output signal is input to speaker-amp. beeps: switch control from beep pin to speaker-amp 0: off (default) 1: on when beeps bit is ? 1 ? , beep signal is input to speaker-amp. sppsn: speaker-amp power-save mode 0: power-save mode (default) 1: normal operation when sppsn bit is ? 0 ? , speaker-amp is in power-save mode. in this mode, spp pin goes to hi-z and spn pin is outputs svdd/2 voltage. when pmspk bit = ? 1 ? , sppsn bit is enabled. after the pdn pin is set to ? h ? , speaker-amp is in power-down mode since pmspk bit is ? 0 ? . asahi kasei [ak4633] ms0447-e-03 2006/04 - 58 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 03h signal select 2 pfsdo aops mgain1 spkg1 spkg0 beepa pfdac adcpf default 1 0 0 0 0 0 0 1 adcpf : select the input signal to programmable filter/alc 0: sdti 1: output from adc (default) pfdac : select the input signal to dac 0: sdti (default) 1: output from programmable filter/alc beepa: switch control from beep signal to mono line output amp 0: off (default) 1: on when pmao bit is ? 1 ? , beepa bit is enabled. when pmao bit is ? 0 ? , the aout pin go to avss. spkg1-0: select speaker-amp output gain ( table 35) default: ? 00 ? dac spk dacs aout beep beeps daca beepa figure 44. speaker and mono lineout-amps switch control mgain1: mic-amp gain control (table 18) mgain2, mgain0 bit is d1,d2 bit of 02h. default: ? 001h ? (+20.0db) aops: mono line output power-save mode 0: normal operation (default) 1: power save mode power-save mode is enable at aops bit = ? 1 ? . pop noise at power-up/down can be reduced by changing at aops bit = ? 1 ? (figure 40). pfsdo : select the output signal from sdto 0: output from adc (+ 1 st hpf) 1: output from programmable filter/alc(default) asahi kasei [ak4633] ms0447-e-03 2006/04 - 59 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 04h mode control 1 pll3 pll2 pl l1 pll0 bcko1 bcko0 dif1 dif0 default 0 0 0 0 0 0 1 0 dif1-0: audio interface format (table 15) default: ? 10 ? (msb justified) bcko1-0: select bick output frequency at master mode (table 9) default: ? 00 ? (16fs) pll3-0: select input frequency at pll mode (see table 4) default: ? 0000 ? (fck pin) addr register name d7 d6 d5 d4 d3 d2 d1 d0 05h mode control 2 adrst fcko fs3 msbs bckp fs2 fs1 fs0 default 0 0 0 0 0 0 0 0 fs3-0: setting of sampling frequency (table 5 and table 6) and mcki frequency (see table 11) these bits are selected to sampling frequency at pll mode and mcki frequency at ext mode. default: ? 0000 ? bckp, msbs: ? 00 ? (default) (table 16) fcko: select fck output frequency at master mode (table 10) ? 0 ? (default) adrst: select adc initialization cycle 0: 1059/fs (default) 1: 291/fs addr register name d7 d6 d5 d4 d3 d2 d1 d0 06h timer select 0 0 ztm1 ztm0 wtm1 wtm0 rfst1 rfst0 default 0 0 0 0 0 0 0 0 wtm1-0: alc1 recovery waiting period (table 26) a period of recovery operation when any limiter operation does not occur during the alc1 operation. default is ? 00 ? . ztm1-0: alc1 zero crossing timeout period (table 25) when the ipga perform zero crossing or timeout, the ipga value is changed by the p write operation, alc1 recovery operation. default is ? 00 ? . frsl1-0: alc first recovery speed(table 30) default: ? 00 ? (4times) asahi kasei [ak4633] ms0447-e-03 2006/04 - 60 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 07h alc mode control 1 0 alc2 alc1 zelmn lmat1 lmat0 rgain0 lmth0 default 0 0 0 0 0 0 0 1 lmth1-0: alc limiter detection level / recovery waiting counter reset level (table 23) lmth1 bit is d6 bit of 0bh. default: ? 01 ? . rgain1-0: alc recovery gain step(table 27) rgain1 bit is d7 bit of 0bh. default: ? 00 ? lmat1-0: alc limiter att step(table 24) default: ? 00 ? zelmn: enable zero cr ossing detectio n at alc limi ter operation 0: enable (default) 1: disable alc1: alc enable for recording 0: recording alc disable (default) 1: recording alc enable alc2: alc enable for playback 0: playback alc disable (default) 1: playback alc enable addr register name d7 d6 d5 d4 d3 d2 d1 d0 08h alc mode control 2 iref7 iref6 iref5 iref4 iref3 iref2 iref1 iref0 default 1 1 0 0 0 1 0 1 iref7-0: reference value at recording alc recovery operation. 0.375db step, 242 level (table 28) default: ? c5h ? (+19.5db) addr register name d7 d6 d5 d4 d3 d2 d1 d0 09h input digital volume control ivol7 ivol6 ivol5 ivol4 ivol3 ivol2 ivol1 ivol0 default 1 0 0 1 0 0 0 1 ivol7-0: input digital volume; 0.375db step, 242 level (table 20) default: ? 91h ? (0.0db) addr register name d7 d6 d5 d4 d3 d2 d1 d0 0ah digital volume control ovol7 ovol6 ovol5 ovol4 ovol3 ovol2 ovol1 ovol0 default 1 0 0 1 0 0 0 1 ovol7-0: output digital volume; 0.375db step, 242 level (table 21) default: ? 91h ? (0.0db) asahi kasei [ak4633] ms0447-e-03 2006/04 - 61 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 0bh alc mode control 3 rgain1 lmth1 oref5 oref4 oref3 oref2 oref1 oref0 default 0 0 1 0 1 0 0 0 oref5-0: reference value at playback alc recovery operation. 0.375db step, 50 level (table 29) default: ? 28h ? (+6.0db) rgain1-0: alc recovery gain step(table 27) rgain1 bit is d1 bit of 07h. default: ? 00 ? addr register name d7 d6 d5 d4 d3 d2 d1 d0 0dh input digital volume control vol7 vol6 vol5 vol4 vol3 vol2 vol1 vol0 default - - - - - - - - vol7-0: current alc volume value; 0.375db step, 242 level. read operation only(table31) addr register name d7 d6 d5 d4 d3 d2 d1 d0 0eh mode control 3 datt1 datt0 smute mdif eq2 eq1 hpf hpfad default 0 0 0 0 0 0 1 1 hpfad: hpf after adc enable 0: disable 1: enable(default) when hpfad bit = ? 0 ? , hpfad block is through (0db). hpf: hpf enable in filter block that pmpfil bit is controlled. 0: disable 1: enable(default) when hpf bit = ? 0 ? , hpf block is through (0db). eq1: equalizer1(eq1) enable 0: disable (default) 1: enable when eq1 bit is ? 1 ? , the settings of eqa15-0, eqb15-0 and eqc15-0 bits are enabled. when eq1 bit is ? 0 ? , eq1 block is through (0db). eq2: equalizer2(eq2) enable 0: disable (default) 1: enable when eq2 bit is ? 1 ? , the settings of eqa15-0, eqb15-0 and eqc15-0 bits are enabled. when eq2 bit is ? 0 ? , eq2 block is through (0db). smute: soft mute control 0: normal operation (default) 1: dac outputs soft-muted mdif: mic input type select 0: single-ended input (mic pin input: default) 1: full-differential input (mic pin and beep/micp pin input) when mdif bit = ? 1 ? , it must be set pmbp bit = beepa bit = beeps bit = ? 0 ? . datt1-0: output digital volume2; 6db step, 4 level (table 22) default: ? 00h ? (0.0db) asahi kasei [ak4633] ms0447-e-03 2006/04 - 62 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 10h e1 co-efficient 0 e1a7 e1a6 e1 a5 e1a4 e1a3 e1a2 e1a1 e1a0 11h e1 co-efficient 1 e1a15 e1a14 e1a13 e1a12 e1a11 e1a10 e1a9 e1a8 12h e1 co-efficient 2 e1b7 e1b6 e1 b5 e1b4 e1b3 e1 b2 e1b1 e1b0 13h e1 co-efficient 3 e1b15 e1b14 e1 b13 e1b12 e1b11 e1b10 e1b9 e1b8 14h e1 co-efficient 4 e1c7 e1c6 e1 c5 e1c4 e1c3 e1 c2 e1c1 e1c0 15h e1 co-efficient 5 e1c15 e1c14 e1 c13 e1c12 e1c11 e1c10 e1c9 e1c8 16h e2 co-efficient 0 e2a7 e2a6 e2 a5 e2a4 e2a3 e2a2 e2a1 e2a0 17h e2 co-efficient 1 e2a15 e2a14 e2a13 e2a12 e2a11 e2a10 e2a9 e2a8 18h e2 co-efficient 2 e2b7 e2b6 e2 b5 e2b4 e2b3 e2 b2 e2b1 e2b0 19h e2 co-efficient 3 e2b15 e2b14 e2 b13 e2b12 e2b11 e2b10 e2b9 e2b8 1ah e2 co-efficient 4 e2c7 e2c6 e2 c5 e2c4 e2c3 e2 c2 e2c1 e2c0 1bh e2 co-efficient 5 e2c15 e2c14 e2c13 e2c12 e2c11 e2c10 e2c9 e2c8 default 0 0 0 0 0 0 0 0 e1a15-0, e1b15-0, e1c15-0: coefficient for equalizer 1(16bit x3) default: ? 0000h ? e2a15-0, e2b15-0, e2c15-0: coefficient for equalizer 2 (16bit x3) default: ? 0000h ? addr register name d7 d6 d5 d4 d3 d2 d1 d0 1ch hpf co-efficient 0 f1a7 f1a6 f1a5 f1a4 f1a3 f1a2 f1a1 f1a0 default 0 0 0 1 0 1 1 0 addr register name d7 d6 d5 d4 d3 d2 d1 d0 1dh hpf co-efficient 1 0 0 f1a13 f1a12 f1a11 f1a10 f1a9 f1a8 default 0 0 0 1 1 1 1 1 addr register name d7 d6 d5 d4 d3 d2 d1 d0 1eh hpf co-efficient 2 f1b7 f1b6 f1b5 f1b4 f1b3 f1b2 f1b1 f1b0 default 0 0 1 0 1 0 1 1 addr register name d7 d6 d5 d4 d3 d2 d1 d0 1fh hpf co-efficient 3 0 0 f1b13 f1b12 f1b11 f1b10 f1b9 f1b8 default 0 0 0 1 1 1 1 0 f1a13-0, f1b13-0: fil1 (wind-noise reduction filter) coefficient setting enable (14bit x 2) default: f1a13-0 bits = 0x1f 16, f1b13-0 bits = 0x1e2b fc = 75hz@fs=8khz, 150hz@fs=16khz asahi kasei [ak4633] ms0447-e-03 2006/04 - 63 - system design figure 45 shows the system connection diagram for the ak4633. an evaluation board [AKD4633] is available which demonstrates the optimum layout, power supply arrangements and measurement results. single ended input mic 23 24 22 vcom 1 2 3 4 5 6 a vss vcoc pdn csn mpi aout cdti 14 13 18 17 16 15 8 9 10 11 12 fck sdti sdto bick mcko mcki top view 10 a nalog supply 2.2 3.6v beep a vdd spp spn dvdd dvss dsp or p + 0.1 10 + 0.1 0.1 1 2.2 0.1 10 + cp rp 2.2k r c 1 20k 220 speaker r1 r2 zd2 zd1 dynamic spk : r1,r2 : short zd1,zd2 : open peizo spk : r1,r2 : 10 ? zd1,zd2 : required cclk 7 21 svdd 20 svss 19 a nalog supply 2.2 4.0v figure 45. typical connection diagram asahi kasei [ak4633] ms0447-e-03 2006/04 - 64 - differential input micp 23 24 22 vcom 1 2 3 4 5 6 a vss vcoc pdn csn mpi aout cdti 14 13 18 17 16 15 8 9 10 11 12 fck sdti sdto bick mcko mcki to p vi e w 10 a nalog supply 2.2 3.6v a vdd spp spn dvdd dvss dsp or p + 0.1 10 + 0.1 0.1 1 2.2 0.1 10 + cp rp 1k 1 20k 220 speaker r1 r2 zd2 zd1 dynamic spk : r1,r2 : short zd1,zd2 : open peizo spk : r1,r2 : 10 ? zd1,zd2 : required cclk 7 21 svdd 20 svss 19 a nalog supply 2.2 4.0v micn 1 1k figure 46. typical connection diagram note: - avss, dvss and svss of the ak4633 should be distributed separately from the ground of external controllers. - if avdd and dvdd are separated, dvdd should be set from 1.6v to 3.6v. - all digital input pins should not be left floating. - when the ak4633 is ext mode (pmpll bit = ? 0 ? ), a resistor and capacitor of vcoc pin is not needed. - when the ak4633 is pll mode (pmpll bit = ? 1 ? ), a resistor and capacitor of vcoc pin is shown in table 36. rp and cp of vcoc pin mode pll3 bit pll2 bit pll1 bit pll0 bit pll reference clock input pin input frequency rp[ ? ] cp[f] pll lock time (max) 0 0 0 0 0 fck pin 1fs 6.8k 220n 160ms default 1 0 0 0 1 bick pin 16fs 10k 4.7n 2ms 2 0 0 1 0 bick pin 32fs 10k 4.7n 2ms 3 0 0 1 1 bick pin 64fs 10k 4.7n 2ms 4 0 1 0 0 mcki pin 11.2896mhz 10k 4.7n 40ms 5 0 1 0 1 mcki pin 12.288mhz 10k 4.7n 40ms 6 0 1 1 0 mcki pin 12mhz 10k 4.7n 40ms 7 0 1 1 1 mcki pin 24mhz 10k 4.7n 40ms 12 1 1 0 0 mcki pin 13.5mhz 10k 10n 40ms 13 1 1 0 1 mcki pin 27mhz 10k 10n 40ms others others n/a table 36. setting of pll mode (*fs: sampling frequency) asahi kasei [ak4633] ms0447-e-03 2006/04 - 65 - 1. grounding and power supply decoupling the ak4633 requires careful attention to power supply and grounding arrangements. avdd, dvdd and svdd are usually supplied from the system?s analog supply. if avdd, dvdd and svdd are supplied separately, the correct power up sequence should be observed. avss, dvss and svss of the ak4633 should be connected to the analog ground plane. system analog ground and digital ground should be connected together near to where the supplies are brought onto the printed circuit board. decoupling capacitors s hould be as near to the ak4633 as possible, with the small value ceramic capacitor being the nearest. 2. voltage reference vcom is a signal ground of this chip. a 2.2 f electrolytic capacitor in parallel with a 0.1 f ceramic capacitor attached to the vcom pin eliminates the effects of high frequency noise. no load current may be drawn from the vcom pin. all signals, especially clocks, should be kept away from the vcom pin in order to avoid unwanted coupling into the ak4633. 3. analog inputs the mic and beep inputs are single-ended. the input signal range scales with nominally at 0.06 x avdd vpp for the mic input and 0.6 x avdd vpp for the beep input, centered around the internal common voltage (approx. 0.45 x avdd). usually the input signal is ac coupled using a capacitor. the cut-off frequency is fc = (1/2 rc). the ak4633 can accept input voltages from avss to avdd. 4. analog outputs the input data format for the dac is 2?s complement. the output voltage is a positive full scale for 7fffh(@16bit) and a negative full scale for 8000h(@16bit). mono output from the mout pin and mono line output from the aout pin are centered at 0.45 x avdd (typ). the speaker-amp output is centered at svdd/2. asahi kasei [ak4633] ms0447-e-03 2006/04 - 66 - control sequence ? clock set up when adc, dac and programmable filter are used, the clocks must be supplied. 1. in case of pll master mode bick pin fck pin mcko bit (addr:01h, d1) pmpll bit (addr:01h, d0) 40msec(max) output (1) (6) power supply pdn pin pmvcm bit (addr:00h, d6) (2) (3) mcki pin (5) (4) input m/s bit (addr:01h, d3) 1msec (max) (7) mcko pin output (9) (8) 40msec(max) example: audio i/f format: dsp mode, bckp = msbs = ?0? bick frequency at master mode: 64fs input master clock select at pll mode: 13.5mhz mcko : enable sampling frequency:16khz (1) power supply & pdn pin = ?l? ? ?h? (3)addr:00h, data:40h (2)addr:01h, data:08h addr:04h, data:c8h addr:05h, data:02h (4)addr:01h, data:0bh mcko, bick and fck output figure 47. clock set up sequence (1) asahi kasei [ak4633] ms0447-e-03 2006/04 - 67 - 2. when the external clock (fck or bick pin) is used in pll slave mode. pmpll bit (addr:01h, d0) internal clock (1) power supply pdn pin pmvcm bit (addr:00h, d6) (2) (3) fck pin bick pin (4) (5) input 4fs of example: audio i/f format : dsp mode, bckp = msbs = ?0? pll reference clock: bick bick frequency: 64fs sampling frequency: 16khz (1) power supply & pdn pin = ?l? ? ?h? (3) addr:00h, data:40h (2) addr:04h, data:30h addr:05h, data:01h (4) addr:01h, data:01h bick and fck input figure 48. clock set up sequence (2) asahi kasei [ak4633] ms0447-e-03 2006/04 - 68 - 3. when the external clock (mcki pin) is used in pll slave mode. bick pin fck pin pmpll bit (addr:01h, d0) (1) power supply pdn pin pmvcm bit (addr:00h, d6) (2) (3) mcki pin (5) (4) input mcko pin output (6) (7) 40msec(max) (8) input example: audio i/f format: dsp mode, bckp = msbs = ?0? bick frequency at master mode: 64fs input master clock select at pll mode: 13.5mhz mcko : enable sampling frequency:16khz (1) power supply & pdn pin = ?l? ? ?h? (3)addr:00h, data:40h (2)addr:04h, data:c8h addr:05h, data:02h (4)addr:01h, data:03h mcko output start bick and fck input start figure 49. clock set up sequence (3) asahi kasei [ak4633] ms0447-e-03 2006/04 - 69 - 4. ext slave mode (1) power supply pdn pin pmvcm bit (addr:00h, d6) (2) (3) fck pin bick pin (5) input pmpll bit (addr:01h, d0) "l" (5) mcki pin input (4) example audio i/f format:msb justified (adc and dac) input mcki frequency: 1024fs sampling frequency:16khz mcko: disable (1) power supply & pdn pin = ?l? ? ?h? (3) addr:00h, data:40h (2) addr:04h, data:02h addr:05h, data:02h mcki, bick and fck input figure 50. clock set up sequence (4) asahi kasei [ak4633] ms0447-e-03 2006/04 - 70 - ? mic input recording fs3-0 bits (addr:05h, d5,d2-0) mic control (addr:02h, d2-0) pmadc bit (addr:00h, d0) pmpfil bit (addr:00h, d7) adc internal state xxxx xxxx 001 1xx power down initialize normal state power down 291/fs or 1059/fs (1) (2) (10) (11) alc1 state alc1 enable alc1 disable alc1 disable (6) alc1 control 1 (addr:06h) xxh xxh (3) alc1 control 2 (addr:08h) xxh xxh (4) alc1 control 3 (addr:07h) xxh 2xh ivol7-0 bits (addr:09h) xxh xxh (5) (7) signal select (addr:03h) xxh 81h adrst bit (addr:05h, d7) filter co-ef (addr:10h-1f) xx....x xx....x filter select (addr:0eh d3-0) xxx1 xxx1 (8) (9) x x figure 51. mic input recording sequence asahi kasei [ak4633] ms0447-e-03 2006/04 - 71 - example: pll master mode audio i/f format:dsp mode, bckp=msbs=?0? sampling frequency: 16khz pre mic amp:+20db mic power on adc initialize time : 291/fs alc1 setting:refer to table 32 hpfad, hpf : on (fc=150hz) 2 band eq : off (2) addr:02h, data:05h (3) addr:06h, data:14h (1) addr:05h, data:82h (4) addr:08h, data:c5h (5) addr:09h, data:c5h (6) addr:07h, data:2dh (7) addr:03h, data:81h (8-1) addr:1ch, data:16h (8-2) addr:1dh, data:1fh (8-3) addr:1eh, data:2bh (8-4) addr:1fh, data:1eh (9) addr:0eh, data:03h (10) addr:00h, data:c1h recording (11) addr:00h, data:40h figure 52. mic input recording sequence example asahi kasei [ak4633] ms0447-e-03 2006/04 - 72 - asahi kasei [ak4633] ms0447-e-03 2006/04 - 73 - ? speaker-amp output fs3-0 bits (addr:05h, d5,d2-0) xxxx xxxx (1) (2) dacs bit (addr:02h, d3) pmpfil bit (addr:00h, d7) alc2 state alc2 enable alc2 disable alc2 disable (6) alc2 control 1 (addr:06h) xxh xxh (3) alc2 control 2 (addr:10h) xxh xxh (4) alc2 control 3 (addr:07h) xxh 4xh ovol7-0 bits (addr:0ah) xxh xxh (5) (7) signal select (addr:03h) xxxxxxxx 000xx010 filter co-ef (addr:10h-1f) xx....x xx....x filter select (addr:0eh d3-0) xxx1 xx11 (8) (9) pmdac bit (addr:00h, d2) pmspk bit (addr:00h, d4) spp pin normal output sppsn bit (addr:02h, d7) hi-z hi-z spn pin normal output hi-z hi-z svdd/2 svdd/2 (10) (11) (14) (12) (13) figure 53. speaker-amp output sequence asahi kasei [ak4633] ms0447-e-03 2006/04 - 74 - example: pll master mode audio i/f format:dsp mode, bckp=msbs=?0? sampling frequency: 16khz spkg1-0 bits = ?01? alc2 : on alc2 setting:refer to table 33 hpf : on (fc=150hz) 2 band eq : off (2) addr:02h, data:20h (3) addr:06h, data:14h (1) addr:05h, data:02h (4) addr:0bh, data:28h (5) addr:0ah, data:91h (6) addr:07h, data:4dh (7) addr:03h, data:0ah (8-1) addr:1ch, data:16h (8-2) addr:1dh, data:1fh (8-3) addr:1eh, data:2bh (8-4) addr:1fh, data:1eh (9) addr:0eh, data:03h (10) addr:00h, data:d4h (11) addr:02h, data:a0h playback (12) addr:02h, data:20h (13) addr:02h, data:00h (14) addr:00h, data:40h figure 54. speaker-amp output sequence example asahi kasei [ak4633] ms0447-e-03 2006/04 - 75 - asahi kasei [ak4633] ms0447-e-03 2006/04 - 76 - ? beep signal output from speaker-amp pmspk bit (addr:00h, d4) beeps bit (addr:02h, d6) spp pin normal output sppsn bit (addr:02h, d7) hi-z hi-z spn pin normal output hi-z hi-z svdd/2 svdd/2 (2) (1) (5) (4) pmbp bit (addr:00h, d2) clocks can be stopped. clock (3) (6) example: (1) addr:00h, data:70h (2) addr:02h, data:40h (3) addr:02h, data:c0h beep signal output (4) addr:02h, data:40h (5) addr:00h, data:40h (6) addr:02h, data:00h figure 55. ? beep-amp ? speaker-amp ? output sequence asahi kasei [ak4633] ms0447-e-03 2006/04 - 77 - ? mono lineout fs3-0 bits (addr:05h, d5, d2-0) ovol7-0 bits (addr:0ah, d7-0) pmdac bit (addr:00h, d2) pmao bit (addr:00h, d3) xxxx xxxx xxh xxh aout pin (1) (6) (2) daca bit (addr:02h, d4) (11) normal output (8) aops bit (addr:03h, d6) (7) >300 ms (9) (10) >300 ms (12) (4) alc2 bit (addr:07h, d6) (3) adcpf bit (addr:03h, d0) pfdac bit (addr:03h, d1) 0 or 1 0 0 or 1 1 0 or 1 0 (5) pmpfil bit (addr:00h, d7) example: pll, master mode audio i/f format :dsp mode, bckp=msbs= ?0? sampling frequency: 16khz digital volume: 0db (1) addr:05h, data:02h (2) addr:02h, data:10h (3) addr:03h, data:02h (4) addr:07h, data:00h (5) addr:0ah, data:91h (6) addr:03h, data:42h (7) addr:00h, data:cch (8) addr:03h, data:02h playback (9) addr:03h, data:42h (10) addr:00h, data:40h (11) addr:02h, data:00h (12) addr:03h, data:02h figure 56. mono lineout sequence asahi kasei [ak4633] ms0447-e-03 2006/04 - 78 - ? stop of clock master clock can be stopped when adc, dac and programmable filter don?t operate. 1. pll master mode external mcki pmpll bit (addr:01h, d0) mcko bit (addr:01h, d1) input (3) (1) (2) "h" or "l" example: audio i/f format: dsp mode, bckp = msbs = ?0? bick frequency at master mode : 64fs input master clock select at pll mode : 11.2896mhz sampling frequency:8khz stop an external mcki (1) (2) addr:01h, data:08h figure 57. clock stopping sequence (1) asahi kasei [ak4633] ms0447-e-03 2006/04 - 79 - 3. pll slave mode (mcki pin) external mcki pmpll bit (addr:01h, d0) input (1) (2) mcko bit (addr:01h, d1) (1) example audio i/f format : dsp mode, bckp = msbs = ?0? pll reference clock: mcki bick frequency: 64fs sampling frequency: 8khz (1) addr:01h, data:00h (2) stop the external clocks figure 59. clock stopping sequence (3) asahi kasei [ak4633] ms0447-e-03 2006/04 - 80 - package 24pin qfn (unit: mm) 2.4 0.15 0.5 0.23 0.05 0.2 0.75 0.05 2.4 0.15 1 7 12 19 4.0 0.1 4.0 0.1 0.40 0.1 a b 0.10 m 0.08 6 24 13 18 pin #1 id (0.35 x 45 ) exposed pad note) the exposed pad on the bottom surface of the package must be open or connected to gnd. ? material & lead finish package molding compound: epoxy lead frame material: cu lead frame surface treatment: solder (pb free) plate asahi kasei [ak4633] ms0447-e-03 2006/04 - 81 - marking 4633 x xxx 1 xxxx: date code (4 digit) pin #1 indication revision history date (yy/mm/dd) revision reason page contents 05/12/26 00 first edition 06/04/28 03 error correct 40 table 19 : pdsdo bit pfsdo bit error correct 41 2 band equalizer : the coefficient of c is corrected. [before correct] c = 1 ? tan ( fb/fs) 1 + tan ( fb/fs) [after correct] c = 1 ? tan ( fb/fs) 1 + tan ( fb/fs) ? a1 asahi kasei [ak4633] ms0447-e-03 2006/04 - 82 - important notice ? these products and their specifications are subject to change without notice. before considering any use or application, consult the asahi kasei microsystems co., ltd. (akm) sales office or authorized distributor concerning their current status. ? akm assumes no liability for infringement of any patent, intellectual property, or other right in the application or use of any information contained herein. ? any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. ? akm products are neither intended nor authorized for use as critical components in any safety, life support, or other hazard related device or system, and akm assumes no responsibility relating to any such use, except with the express written consent of the representative director of akm. as used here: a. a hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. b. a critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. ? it is the responsibility of the buyer or distributor of an akm product who distributes, disposes of, or otherwise places the product with a third party to notify that party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold akm harmless from any and all claims arising from the use of said product in the absence of such notification. |
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