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| [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 1 - 1. general description the ak555 x series is a 32 - bit, 768 khz sampling, differential input a/d converter for digital audio systems. it achieves 1 15 db dynamic range and 1 06 db s / (n+d) while maintaining low power consumption performance. the ak555 4 i ntegrates a 4 - channel a/d converter, suitable for mixers and multi - channel recorders . four types of di gital filters are integrated and selectable according to the sound quality preference . the ak555 4 can be easily connected to a dsp by supporting tdm audio format s. additionally, it support s dsd output up to 11.2mhz. t he channel summation mode improves the dynamic range performance by summing - up multiple channel a/d data and averaging. the dynamic range is improved to 1 18 db in 4 - to - 2 mode and to 12 1 db in 4 - to - 1 mode. 2. features ? sampling rate: 8 khz - 768 khz ? input: full differential inputs ? s/(n+d): 1 06 db ? dr: 1 15 db ( 4 - to - 2 mode : 1 18 db, 4 - to - 1 mode : 12 1 db) ? s/n: 1 15 db ( 4 - to - 2 mode : 1 18 db, 4 - to - 1 mode : 12 1 db) ? internal filter: four types of lpf , digital hpf ? power supply : 4.5 - 5. 5 v ( analog ), 1.7 - 1.98 v or 3.0 - 3.6 v ( digital ) ? output format pcm mode: 24/32 - bit msb justified , i 2 s or tdm dsd mode: dsd native 64, 128, 256 maximized slot efficiency in tdm mode by optimal data placed mode ? cascade tdm i/f: tdm512: fs= 48 khz tdm256: fs= 96 khz or 48 khz tdm126: fs= 192 khz , 96 khz or 48 khz ? operation mode: master mode & slave mode ? detection function: input overflow flag ? serial interface: 3 - wire serial and i 2 c p i/f (pin setting is also available) ? power consumption : 1 4 0 mw (@avdd= 5.0 v, tvdd= 3.3 v, fs= 48 khz) ? package : 48 - pin qfn 4 - channel differential 32 - bit ? ? adc ak555 4
[ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 2 - 3. table of contents 1. general description ................................ ................................ ................................ ............................ 1 2. features ................................ ................................ ................................ ................................ .............. 1 3. table of contents ................................ ................................ ................................ ................................ 2 4. block diagram ................................ ................................ ................................ ................................ ..... 3 block diagram ................................ ................................ ................................ ................................ .... 3 5. pin configurations and functions ................................ ................................ ................................ ...... 4 pin configurations ................................ ................................ ................................ ............................. 4 pin functions ................................ ................................ ................................ ................................ ..... 5 handling of unused pin ................................ ................................ ................................ ..................... 7 6. absolute maximum ratings ................................ ................................ ................................ ................ 8 7. recommended operation conditions ................................ ................................ ................................ 8 8. analog characteristics ................................ ................................ ................................ ........................ 9 9. filter characteristics ................................ ................................ ................................ ......................... 10 adc filter characteristics (fs= 48 khz) ................................ ................................ .......................... 10 adc filter characteristics (fs= 96 khz) ................................ ................................ .......................... 12 adc filter characteristics (fs= 192 khz) ................................ ................................ ........................ 14 adc filter characteristics (fs= 384 khz) ................................ ................................ ........................ 16 adc filter characteristics (fs= 768 khz) ................................ ................................ ........................ 17 10. dc chara cteristics ................................ ................................ ................................ ........................ 18 11. switching characteristics ................................ ................................ ................................ .............. 19 timing diagram ................................ ................................ ................................ ............................... 26 12. functional descriptions ................................ ................................ ................................ ................. 31 digital core power supply ................................ ................................ ................................ ............... 31 output mode ................................ ................................ ................................ ................................ .... 31 master mode and slave mode ................................ ................................ ................................ ......... 31 system clock ................................ ................................ ................................ ................................ ... 31 audio interface format ................................ ................................ ................................ .................... 34 channel summatio n (pcm mode, dsd mode) ................................ ................................ .............. 46 optimal data placement mode (pcm mode, dsd mode) ................................ .............................. 46 ch power down & channel summation (pcm mode, dsd mode) ................................ ............... 46 data slot configuration ................................ ................................ ................................ .................... 50 digital filter setting (pcm mode) ................................ ................................ ................................ .... 51 digital hpf (pcm mode) ................................ ................................ ................................ ................. 51 overflow detection (pcm mode, dsd mode) ................................ ................................ ................. 51 ldo ................................ ................................ ................................ ................................ .................. 52 reset ................................ ................................ ................................ ................................ ................ 52 power down function/ sequence ................................ ................................ ................................ ... 53 operation mode control ................................ ................................ ................................ .................. 56 register control interface ................................ ................................ ................................ ................ 56 register m ap ................................ ................................ ................................ ................................ .... 60 register definitions ................................ ................................ ................................ .......................... 60 13. recommended external circuits ................................ ................................ ................................ .. 63 14. package ................................ ................................ ................................ ................................ ......... 66 outline dimensions ................................ ................................ ................................ .......................... 66 material & lead finish ................................ ................................ ................................ ..................... 66 marking ................................ ................................ ................................ ................................ ............ 6 6 15. ordering guide ................................ ................................ ................................ .............................. 67 16. revision history ................................ ................................ ................................ ............................ 67 important notice ................................ ................................ ................................ ........................... 68 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 3 - 4. block diagram block diagram figure 1 . block diagram voltage reference serial output interface delta - sigma modulator controller ldo decimation filter hpf ain1p ain1n dif0/dsdsel0 dif1/dsdsel1 bick/dclk lrck/dsdol1 ps/cad0_ spi cks0/sda/cdti cks1/cad0_i2c/csn cks2/scl/cclk cks3/cad1 vdd18 vrefh1 vrefl1 vrefh2 vrefl2 ldoe tvdd avdd avss dvss pdn delta - sigma modulator decimation filter hpf ain2p ain2n delta - sigma modulator decimation filter hpf ain3p ain3n delt a - sigma modulator decimation filter hpf ain4p ain4n tdmin/dsdor1 sdto1/dsdol2 sdto2/dsdor2 dp tdm0 tdm1 odp mclk test slow/dckb sd/pmod pw2 pw1 pw0 msn ovf dcks/hpfe i2c [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 4 - 5. pin configurations and functions pin configurations * the exposed pad at back face of the package must be open or connected to the ground. figure 2 . pin configurations dif0/dsdsel0 dif1/dsdsel1 tdm0 tdm1 psn/cad0_spi i2c dp hpf e /dcks ldoe odp ain1p ain1n msn pw2 pw1 pw0 pdn vdd18 dvss tvdd mclk test ain4p ain4n nc vrefl1 vrefh1 ain2n ain2p avdd avss ain3p ain3n vrefh2 vrefl2 nc sd/pmod slow/dckb cks3/cad1 cks2/scl/cclk cks1/cad0_i2c/csn cks0/sda/cdti ovf sdto2/dsdor2 sdto1/dsdol2 td min/dsdor1 lrck/dsdol1 bick/dclk 48 qfn top view 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 36 35 34 33 32 31 30 29 28 27 26 25 37 38 39 40 41 42 43 44 45 46 47 48 exposed pad (back face) * [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 5 - pin functions no. pin name i/o function power down status 1 nc - no internal bonding. connect to avss. - 2 vrefl1 i adc low level voltage reference input pi n - 3 vrefh1 i adc high level voltage reference input pin - 4 ain2n i channel 2 negative input pin - 5 ain2p i channel 2 positive input pin - 6 avdd - analog power supply pin (ain1 - 4) , 4. 5 - 5. 5 v - 7 avss - analog ground pin (ain1 - 4) - 8 ain3p i chann el 3 positive input pin - 9 ain3n i channel 3 negative input pin - 10 vrefh2 i adc high level voltage reference input pin - 11 vrefl2 i adc low level voltage reference input pin - 12 nc - no internal bonding. connect to avss. - 13 ain4n i channel 4 ne gative input pin - 14 ain4p i channel 4 positive input pin - 15 test i test enable pin - 16 mclk i master clock input pin - 17 tvdd - digital i/o buffers and ldo power supply pin, 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ). - 18 dvss - digital ground pin - 19 vdd18 i digital core power supply pin, 1.7 - 1.98v (ldoe pin= l ) - o ldo stabilization capacitor c o nnect pin. (ldoe pin= h ) hi - z & pull down with 500 ? 20 pdn i reset & power down pin l : reset & power down, h : normal operation - 21 pw0 i power management pin, channel summation s elect pin1 - 22 pw1 i power management pin, channel summation s elect pin2 - 23 pw2 i power management pin, channel su mmation s elect pin3, - 24 msn i master/slave select pin - 25 bick i audio serial data clock input pin in pcm & slave mode (this pin is pull down by 100 k? internally.) - o audio serial data clock output pin in pcm & master mode (this pin is pull down by 100 k? internally.) hi - z dclk o dsd clock output pin in dsd mode (this pin is pull down by 100 k? internally.) hi - z 26 lrck i channel clock input pin in pcm & slave mode (this pin is pull down by 100 k? internally.) - o channel clock output pin in pcm & master mode (this pin is pull down by 100 k? internally.) hi - z dsdol1 o audio serial data output pin for ain1 in dsd mode (this pin is pull down by 100 k? internally.) hi - z 27 tdmin i tdm data input pin in pcm mode (this pin is pull down by 100 k ? internally.) - dsdor1 o audio serial data output pin for ain 2 in dsd mode (this pin is pull down by 100 k? internally.) hi - z 28 sdto1 o audio serial data output pin for ain1 and ain2 in pcm mode l dsdol2 o audio serial data output pin for ain 3 in ds d mode l 29 sdto2 o audio serial data output pin for ain3 and ain4 in pcm mode l dsdor2 o audio serial data output pin for ain 4 in dsd mode l 30 ovf o analog input over flow flag output pin l [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 6 - no. pin name i/o function power down status 31 cks0 i cl ock mode select pin - sda i/o control data i/o pin in i 2 c bus s erial c ontrol m ode hi - z cdti i control data input pin in 3 - wire s erial c ontrol m ode - 32 cks1 i clock mode select pin - cad0_i2c i chip address 0 pin in i 2 c bus s erial c ontrol m ode - csn i chip select pin in 3 - wire s erial c ontrol m ode - 33 cks2 i clock mode select pin - scl i control data clock pin in i 2 c bus s erial c ontrol m ode - cclk i control data clock pin in 3 - wire s erial c ontrol m ode - 34 cks3 i clock mode select pin - ca d1 i chip address 1 pin in i 2 c bus or 3 - wire s erial c ontrol m ode - 35 slow i slow roll - off digital filter select pin in pcm mode - dckb i polarity of dclk pin in dsd mode - 36 sd i short delay digital filer select pin in pcm mode - pmod i dsd phase m odulation mode select pin in dsd mode - 37 dif0 i audio data format select pin in pcm mode l : msb justified, h : i 2 s - dsdsel0 i dsd sampling rate control pin in dsd mode - 38 dif1 i audio data format select pin in pcm mode l : 24 - bit mode, h : 32 - bit mode - dsdsel1 i dsd sampling rate control pin in dsd mode - 39 tdm0 i tdm i/f format select pin * this pin must be fixed to l when using dsd mode. - 40 tdm1 i tdm i/f format select pin * this pin must be fixed to l when using dsd mode. - 41 psn i control mode select pin (i2c pin = h ) l :i 2 c bus serial control mode, h :parallel control mode - cad0_spi i chip address 0 pin in 3 - wire serial control mode (i2c pin = l ) - 42 i2c i control mode select pin l: 3 - wire s erial c ontrol m ode h: i 2 c bus serial c ontrol m ode or parallel control mode - 43 dp i dsd mode enable pin l : pcm mode, h : dsd mode - 44 hpfe i high pass filter enable pin l : hpf disable, h : hpf enable - dcks i master clock frequency select at dsd mode (dsd only) - 45 ldoe i ldo enable pin l : ldo disable, h : ldo enable this pin is pulled down by 100 k ? - 46 odp i optimal data placement mode enable pin - 47 ain1p i channel 1 positive input pin - 48 ain1n i channel 1 negative input pin - no te 1 . all digital input pins must not be allow ed to float. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 7 - handling of unused pin the unused i/o pins should be connected appropriately . 1. pcm mode classification pin name setting analog ain1 - 4p, ain1 - 4n open vrefh1 - 2 connec t to avdd vrefl1 - 2, nc connect to avss digital tdmin, test connect to dvss sdto1 - 2, ovf open 2. dsd mode classification pin name setting analog ain1 - 4p, ain1 - 4n open vrefh1 - 2 connect to avdd vrefl1 - 2, nc connect to avss digital tdm0, tdm1, test connect to dvss dsddol1 - 2, dsddor1 - 2, ovf open note 2 . unused channels must be powered down. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 8 - 6. absolute maximum ratings (vss= 0 v; note 3 ) parameter symbol m in . m ax . unit power suppli es : analog (avdd pin) digital interface (t vdd pin) digital core ( vdd 18 pin) ( note 4 ) avdd am tvdd am vdd18 am ? ? ? ? ? ? ? ? ? ? ? ? is off (ldoe pin = l) and an external power is supplied to the vdd 18 pin . warning: operation at or beyond these limits may result in pe rmanent damage to the device. normal operation is not guaranteed at these extremes. 7. recommended operation conditions (vss=0v; note 3 ) parameter symbol m in . t yp . m ax . unit power supplies analog (avdd pin) avdd 4 .5 5.0 5.5 v (ldoe pin= l) h) h voltage reference l voltage reference pin = l. the power up sequence between avdd pin and tvdd pin or between avdd pin and vdd18 pin is not critical. note 6 . tvdd must not exceed vdd18 0.1 v when ldoe pin= l . note 7 . when ldoe p in = h, the internal ldo supplies 1.8 v (typ). the power up sequences between avdd pin and tvdd pin is not critical. note 8 . vrefh1 - 2 must not exceed avdd+0.1 v . note 9 . vrefl1 - 2 must be connected to avss. analog input voltage is proportional to {(vrefh ) C (vrefl)} . vin (typ, @ 0db) = ? 2.8 ? {(vrefh ) C (vref l )} / 5 [v]. * akm assumes no responsibility for the usage beyond the conditions in this data sheet. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 9 - 8. analog characteristi cs ( ta= 25 ? c; avdd= 5.0 v; tvdd= 3.3 v, fs= 48 khz, bick= 64fs; signal frequency= 1 khz; 24 - bit data; measurement frequency= 20 hz - 20 khz at fs= 48 khz, 40 hz - 40 khz at fs= 96 khz, 40 hz - 40 khz at fs= 192 khz , unless otherwise specified. ) parameter m in . t yp . m ax . unit analog input characteristics: resolution - - 32 bit input voltage ( note 10 ) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? power supplies power supply current normal operation ( pdn pin = h pdn pin = l ? ? (ainnn) that the adc output becomes full - scale (n= 1 - 4 ) . vin = 0.56 ? ( vref h m ? vrefl m ) [vpp] . (m=1 - 2 ) note 11 . psr r is applied to avdd, tvdd with 1 khz, 20 mvpp sine wave. the vrefh1 - 2 are held to the fixed voltage. note 12 . all digital inputs are fixed to tvdd or tvss. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 10 - 9. filter characteristics adc filter characteristics (fs= 48 khz) ( ta= ? 40 - + 10 5 ? c; avdd= 4.5 - 5.5 v, tvdd=1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin= l ) ) parameter symbol m in . t yp . m ax . unit digital filter (decimation lpf): sharp roll - off ( figure 3 ) (sd pin = l passband ( note 13 ) +0.001/ - 0.06 db pb 0 - 22. 0 khz ? ? digital filter (decimation lpf): slow roll - off ( figure 4 ) ( sd pin= l, h) +0.001/ - 0.076 db ? pb 0 - - 21. 9 12.5 - khz khz stopband ( note 13 ) sb 36.5 - - khz stopband attenuation sa 85 - - db group delay distortion 0 - 20.0khz ? digital filter (decimation lpf): short delay sharp roll - off filter ( figure 5 ) ( sd pin= , pin= ) passband ( note 13 ) +0.0 0 1/ ? ? ? digital filter (decimation lpf): short delay slow roll - off ( figure 6 ) ( sd pin= h, h) +0.001/ - 0.076 db ? pb - 0 - - 21. 9 12.5 - khz khz stopband ( note 13 ) sb 36.5 - - khz stopband attenuation sa 85 - - db group delay distortion 0 - 20.0 khz ? digital filter (hpf): frequency response ( note 13 ) ? ? ? ? 0.0 6 db) = 0.46 ? fs (sharp roll - off). for example, pb ( +0.0 01 db/ ? 0.0 76 db) = 0.26 ? fs (slow roll - off). no te 14 . the calculated delay time induced by digital filtering. this time is from the input of an analog signal to the l channel msb output timing of the sdto. it may have an error of +1[1/fs] at maximum when outputting data via audio interfaces. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 11 - figure 3 . sharp roll - off (fs= 48 khz) figure 4 . slow roll - off (fs= 48 khz) figure 5 . short delay sharp roll - off (fs= 48 khz) figure 6 . short delay slow roll - off (fs= 48 khz) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 12 - adc filter characteristics (fs= 96 khz) ( ta= ? 40 - + 10 5 ? c; avdd= 4.5 - 5.5 v, tvdd=1.7 - 1.98 v (ldoe pi n= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin= l ) ) parameter symbol m in . t yp . m ax . unit digital filter (decimation lpf): sharp roll - off ( fig ure 7 ) ( sd pin= l, l) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): slow roll - off ( figure 8 ) ( sd pin= l, h) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): short delay sharp roll - off ( figure 9 ) ( sd pin= , l) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): short delay slow roll - off ( figure 10 ) ( sd pin= , ) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (hpf): frequency response ( note 13 ) ? ? ? ? 0.06 db) = 0.46 ? fs (sharp roll - off). for example, pb ( + 0 .001 db/ ? 0.07 6 db) = 0.26 ? fs (slow roll - off). no te 14 . the calculated delay time induced by digital filtering. this time is from the input of an analog signal to the l channel msb output timing of the sdto. it may have an error of +1[1/fs] at maximum when outputting data via audio interfaces. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 13 - fig ure 7 . sharp roll - off (fs= 96 khz) figure 8 . slow roll - off (fs= 96 khz) figure 9 . short delay sharp roll - off (fs= 96 khz) figure 10 . short delay slow roll - off (fs= 96 khz) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 14 - adc filter characteristics (fs= 192 khz) ( ta= ? 40 - + 10 5 ? c; avdd= 4.5 - 5.5 v, tvdd=1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1 .7 - 1.98 v (ldoe pin= l ) ) parameter symbol m in . t yp . m ax . unit digital filter (decimation lpf): sharp roll - off ( figure 11 ) ( sd pin= l, l) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): slow roll - off ( figure 12 ) ( sd pin= l, h) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): short delay sharp roll - off filter ( figure 13 ) ( sd pin= h, l) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (decimation lpf): short delay slow roll - off filter ( figure 14 ) ( sd pin= h, h) passband ( note 13 ) + 0 .001 / ? ? ? digital filter (hpf): frequency response ( note 13 ) ? ? ? ? 0.0 37 db) =0.4 3 6 ? fs (sharp roll - off). for example, pb ( +0.001 db/ ? 0. 1 db) = 0.16 4 ? fs (slow roll - off). no te 14 . the calculated delay time induced by digital filtering. this time is from the input of an analog signal to the l channel msb output timing of the sdto. it may have an error of +1[1/fs] at maximum when outputting data via audio interfaces. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 15 - figure 11 . sharp roll - off (fs= 192 khz) figure 12 . slow roll - off (fs= 192 khz) figure 13 . short delay sharp roll - off (fs= 192 khz) figure 14 . short delay slow roll - off (fs= 192 khz) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 16 - adc filter characteristics (fs= 384 khz) ( ta= ? 40 - + 10 5 ? c; avdd= 4.5 - 5.5 v, tvdd=1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe p in= l ) ) parameter symbol min. typ. max. unit digital filter (decimation lpf) ( figure 15 ) (sd pin= , slow pin= ) frequency response ( note 13 ) ? ? ? ? ? [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 17 - adc filter characteristics (fs= 768 khz) ( ta= ? 40 - + 10 5 ? c; avdd= 4.5 - 5.5 v, tvdd=1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin= l ) ) parameter symbol min. typ. max. unit digital filter (decimation lpf) ( figure 16 ) (sd pin= x, slow pin=x) frequency response ( note 13 ) ? ? ? ? ? [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 18 - 10. dc characteristics ( ta= ? 40 - 105 ? c; avdd= 4.5 - 5.5 v, vdd18= 1.7 - 1.98 v (ldoe pin=l) ) parameter symbol m in . t yp . m ax . unit tvdd= 3.0 - 3.6 v (ldoe pin= ? ? ? ? ? ? [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 19 - 11. switching characteristics ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol mi n. typ. max . unit master clock timing ( figure 18 ) fclk dclk 2.048 45 - - 49.152 55 mhz % frequency duty cycle lrck frequency (slave m ode) ( figure 17 ) normal m ode (tdm1 - 0 bits = 00) normal speed m ode double speed m ode quad speed m ode oct speed m ode hex speed m ode duty cycle fsn fsd fsq fso fsh duty 8 54 108 - - 45 - - - 384 768 - 54 108 216 - - 55 khz khz khz khz khz % tdm128 m ode (tdm1 - 0 bits = 01) normal speed m ode double speed m ode quad speed m ode high time low time fsn fsd fsq tlrh tlrl 8 54 108 1/128fs 1/128fs - - - - - 54 108 216 - - khz khz khz ns ns tdm256 m ode (tdm1 - 0 bits = 10) normal speed m ode do uble speed m ode high time low time fsn fsd tlrh tlrl 8 54 1/256fs 1/256fs - - - - 54 108 - - khz khz ns ns tdm512 mode (tdm1 - 0 bits = 11) normal speed m ode high time low time fsn tlrh tlrl 8 1/512fs 1/512fs - - - 54 - - khz ns ns parameter symbol min. typ. max. unit lrck frequency (master m ode) ( figure 18 ) normal m ode (tdm1 - 0 bits = 00) normal speed m ode double speed m ode quad speed m ode oct speed m ode hex speed m ode duty cycle fsn fsd fsq fso fsh duty 8 54 108 - - - - - - 384 768 50 54 108 216 - - - khz khz khz khz khz % tdm128 m ode (tdm1 - 0 bits = 01) normal speed m ode double speed m ode quad speed m ode high time fsn fsd fsq tlrh 8 54 108 - - - - 1/4fs 54 108 216 - khz khz khz ns tdm256 m ode (tdm1 - 0 bits = 10) normal speed m ode double speed m ode high time fsn fsd tlrh 8 54 - - - 1/8fs 54 108 - khz khz ns tdm512 m ode (tdm1 - 0 bits = 11) normal speed m ode high time fsn tlrh 8 - - 1/16fs 54 - khz ns [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 20 - ( ta= ? 40 - + 105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol m in . t yp . m ax . unit audio interface timing (slave m ode) normal m ode (tdm1 - 0 bits = 00) (8 khz ? fs ? 2 16 khz) ( figure 19 ) (ldoe pin = h ) bick period normal speed m ode double speed m ode quad speed m od e bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) lrck to sdto (msb) (except i 2 s mode) bick tosdto1/2 t bck tbck tbck tbckl tbckh tlrb tblr tlrs tbs d 1/128fsn 1/128fsd 1/64fsq 32 32 25 25 - - - - - - - - - - - - - - - - - - 25 25 ns ns ns ns ns ns ns ns ns normal m ode (tdm1 - 0 bits = 00 ) (8 khz fs 216 khz) ( figure 19 ) (ldoe pin = l ) bick period normal speed m ode(8 khz fs 48 khz) dou ble speed m ode ( 48 khz fs 96 khz) quad speed m ode ( 96 khz fs 192 khz) bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) lrck to sdto (msb) (except i 2 s mode) bick to sdto1/2 tbck tbck tbck tbckl tbckh tlrb tblr tlrs tbsd 1/128fsn 1/128fsd 1/64fsq 36 36 30 30 - - - - - - - - - - - - - - - - - - 30 30 ns ns ns ns ns ns ns n s ns normal m ode (tdm1 - 0 bits = 00 ) (fs = 384 khz, 768 khz) ( figure 20 ) bick period oct speed mode hex speed mode bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) bick to sdto1/2 tbck tbck tbckl tbckh tlrb tblr tbsdd 1/64fso 1/48fsh 12 12 12 12 5 - - - - - - - - - - - - - 22 ns ns ns n s ns ns ns note 18 . when the 1024fs, 512 fs or 768fs /256fs or 384fs /128fs or 192fs are switched, the ak555 4 should be reset by the pdn pin or rstn bit. note 19 . bick rising edge must not occur at the same ti me as lrck edge. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 21 - ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol m in . t yp . m ax . unit audio interface timing (slave m ode) ( figure 21 ) tdm128 m ode (tdm1 - 0 bits = 01 ) bick period normal speed m ode double speed m ode quad speed m ode bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) bick to sdto1 tdmin hold time tdmin setup time tbck tbck tbck tbckl tbckh tlrb tblr tbsdd tsdh tsds 1/128fsn 1/128fsd 1/128fsq 14 14 14 14 5 5 5 - - - - - - - - - - - - - - - - - 30 - - ns ns ns ns ns ns ns ns ns ns tdm256 m ode (tdm1 - 0 bits = 10 ) bick period normal speed m ode double speed m ode bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) bick to sdto1 tdmin hold time tdmin setup time tbck tbck tbckl tbckh tlrb tblr tbsdd tsdh tsds 1/256fsn 1/256fsd 14 14 14 14 5 5 5 - - - - - - - - - - - - - - - 30 - - ns ns ns ns ns ns ns ns ns tdm512 m ode (tdm1 - 0 bits = 11 ) bick period normal speed m ode bick pulse width low bick pulse width high lrck edge to bick ( note 19 ) bick to lrck edge ( note 19 ) bick to sdto1 tdmin hold time tdmin setup time tbck tbckl tbckh tlrb tblr tbsdd tsdh tsds 1/512fsn 14 14 14 14 5 5 5 - - - - - - - - - - - - - 30 - - ns ns ns ns ns ns ns ns note 18 . when the 1024fs, 512 fs or 768fs /256fs or 384fs /128fs or 192fs are switched, the ak555 4 should be reset by the pdn pin or rstn bit. note 19 . bick rising edge must not occur at the same ti me as lrck edge. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 22 - ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol m in . t yp . m ax . unit audio interface timing ( master mode) ( figure 22 ) normal mode (tdm1 - 0 bits = 00) (8 khz ? fs ? 216 khz) bick period normal speed m ode double speed m ode quad speed m od e bick duty bick to lrck edge bick to sdto1/2 tbck tbck tbck dbck tmblr tbsd - - - - ? 20 ? 20 1/64fsn 1/64fsd 1/64fsq 50 - - - - - - 20 20 ns ns ns % ns ns normal mode (tdm1 - 0 bits = 00) (fs = 384 khz, 768 khz) (ldoe pin = h) bick period oct speed mod e hex speed mode bick duty bick to lrck edge bick to sdto1/2 tbck tbck dbck tmblr tbsd - - - ? 4 ? 4 1/64fso 1/64fsh 50 - - - - - 4 4 ns ns % ns ns normal mode (tdm1 - 0 bits = 00) (fs = 384 khz,768 khz) (ldoe pin = l) bick period oct speed mode hex speed mode bick duty bick to lrck edge bick to sdto1/2 tbck tbck dbck tmblr tbsd - - - ? 5 ? 5 1/64fso 1/48fsh 50 - - - - - 5 5 ns ns % ns ns note 18 . when the 1024fs, 512 fs or 768fs /256fs or 384fs /128fs or 192fs are switched, the ak555 4 should be reset by the pdn pin or rstn bit. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 23 - ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol m in . t yp . m ax . unit audio interface timing (master mode) ( figure 22 ) tdm128 mode (tdm1 - 0 bits = 01) bick period normal speed mode double speed mode quad speed m ode bick duty bick to lrck edge bick to sdto1 ? ? tdm256 mode (tdm 1 - 0 bits = 10) bick period normal speed m ode double speed m ode bick duty bick to lrck edge bick to sdto1 ? ? tdm512 mode (tdm1 - 0 bits = 11) bick period normal speed m ode bick duty bick to lrck edge bick to sdto1 ? ? note 18 . when the 1024fs, 512 fs or 768fs /256fs or 384fs /128fs or 192fs are switched, the ak555 4 should be reset by the pdn pin or rstn bit. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 24 - ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pi n= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pin=l) , c l = 1 0 pf ) parameter symbol min. typ. max . unit audio interface timing (master m ode) ( figure 23 ) dsd audio interface timing (64 fs m ode, dsds el 1 - 0 bits = 00) dclk period dclk pulse width low dclk pulse width high dclk edge to dsd o l/r ( note 20 ) tdck tdckl tdckh tddd - 144 144 ? dsd audio interface timin g (128 fs m ode, dsdsel 1 - 0 bits = 01) dclk period dclk pulse width low dclk pulse width high dclk edge to dsd o l/r ( note 20 ) tdck tdckl tdckh tddd - 72 72 ? dsd au dio interface timing (256 fs m ode, dsdsel 1 - 0 bits = 10) dclk period dclk pulse width low dclk pulse width high dclk edge to dsd o l/r ( note 20 ) tdck tdckl tdckh tddd - 36 36 ? to a dsd o l/r edge when dckb bit = 0 and it is defined from a rising edge of dclk to a dsd o l/r edge when dckb bit = 1. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 25 - ( ta= ? 40 - +105 ? c; avdd= 4.5 - 5.5 v , tvdd= 1.7 - 1.98 v (ldoe pin= l ) or 3.0 - 3.6 v (ldoe pin= h ), vdd18= 1.7 - 1.98 v (ldoe pi n=l) , c l = 1 0 pf ) parameter symbol min. typ. max. unit control interface timing (3 - wire serial m ode): ( figure 25 ) ( figure 26 ) cclk period cclk pulse width low pulse width high cdti setup timing cdti hold timing csn h time csn to cclk cclk to csn control interface timing (i 2 c bus m ode): ( figu re 27 ) scl clock frequency bus free time between transmissions start condition hold tune (prior to first clock pulse) clock low time clock high time setup time for repeated start condition sda hold time from scl falling ( note 21 ) sda setup time from scl rising rise time of both sda and scl lines fall time of both sda and scl lines setup time for stop condition pulse width of spike noise suppressed by input filter capacitive load on bus fscl tbuf thd sta tlow thigh tsu sta thd dat tsu dat tr tf tsu sto tsp cb - 1.3 0.6 1.3 0.6 0.6 0 0.1 - - 0.6 0 - - - - - - - - - - - - - - 400 - - - - - - - 1.0 0.3 - 50 400 khz s s s s s s s s s s ns pf power down & reset timing ( figure 28 ) pdn pulse width ( note 22 ) pdn reject pulse width ( note 22 ) pdn to sdto1 tpd trpd tpdv 150 - - - - 583 - 30 - ns ns 1/fs note 21 . data must be held for sufficient time to bridge the 300 ns transition time of scl. note 22 . the ak555 4 can be reset by setting the pdn pin to l upon power - up. the pdn pin must held l for more than 150 ns for a certain reset. the ak555 4 is not reset by the l pulse less than 30 ns. note 23 . this cycl e is the number of lrck rising edges from the pdn pin = h. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 26 - timing diagram [1] pcm m ode figure 17 . clock timing (slave mode) figure 18 . clock timing (master mode) 1/fclk t d clkl t d clkh m clk tbck tbckl vih tbckh bick vil 1/fs lrck 50%tvdd tlrh tlrl duty =t lrh ? fs ? 100 or t lrl ? fs ? 100 50%tvdd dclk=tdclkh ? fs ? 100 or tdclkl ? fs ? 100 1/fclk tclkl tclkh m clk 1/fbck tbckl tbckh bick 5 0% t vd d 1/fs lrck 50% t vd d t lrh v o h d uty=t lrh ? fs ? 100 dbck=t bckh ? f bck ? 100 or t bckl ? f bck ? 100 50% t vd d d clk =t clk h ? f clk ? 100 or t clk l ? f clk ? 100 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 27 - figure 19 . audio interface timing ( normal mode & slave mode : 8khz fs 216khz ) figure 20 . audio interface timing ( normal & slave mode : fs=384khz, 768khz ) figure 21 . audio interface timing ( tdm & slave m ode) tlrb lrck vih bick vil tlrs sdto 1/2 5 0% t vd d tbsd vih vil tblr tlrb lrck vih bick vil sdto 1/2 5 0% t vd d vih vil tblr tbsdd tlrb lrck vih bick vil sdto 1 /2 5 0% t vd d tbs dd vih vil tblr tsds t d m i n vih vil tsdh [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 28 - figure 22 . audio interface timing (master mode) [2] dsd m ode figure 23 . audio serial interface timing (normal m ode, dckb bit= 0 or dckb pin= l) figure 24 . audio serial interface timing (phase modulation m ode, dckb bit= 0 or dckb pin= l) lrck bick sdto 1 /2 tb s d tmblr 5 0% t v d d 5 0% t v d d 5 0% t v d d t d m i n tsdh tsds vih vil v o h dclk v o l tddd v o h dsd o l 1 - 2 dsd o r 1 - 2 v o l tdckh tdckl tdck v o h dclk v o l tddd v o h dsd o l 1 - 2 dsd o r 1 - 2 v o l tdckh tdckl tdck tddd [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 29 - [3] 3 - wire serial interface figure 25 . write command input timing (3 - wire serial m ode) figure 26 . write data input timing (3 - wire serial m ode) tcss csn vih cclk vil vih cdti vil vih vil c1 c0 r/w a4 tcckl tcckh tcds tcdh csn vih cclk vil vih cdti vil vih vil d3 d2 d1 d0 tcsw tcsh [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 30 - [4] i 2 c interface figu re 27 . i 2 c bus m ode timing [5] power - down timing figure 28 . power - down & reset timing vih vil 50%tvdd tpd sdto1/2 pd n tpdv trp d thigh scl sda vih tlow tbuf thd:sta tr tf thd:dat tsu:dat tsu:sta stop start start stop tsu:sto vil vih vil tsp [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 31 - 12. functional descriptions digital core power s u pply the digital core of the ak555 4 is operates off of a 1.8 v power supply. normally , this voltage is gene rate d by the internal ldo from tvdd (3.3 v) for digital interface . the internal ldo will be powered up by setting the ldoe pi n = h . set the ldoe pin to l and supply a 1.8 v power to the vdd18 pin externall y when a 1.8 v is used as tvdd. output mode the ak555 4 is able to output either pcm or dsd data. the dp pin or dp bit select the output mode. set the pw2 pin = pw1 pin = pw0 pin = l or rstn bit = 0 or pw 4 - 1 bits = 0h to reset all channels when changing the pcm/dsd mode. the ak555 4 outputs data from the sdto1 - 2 pins by bick and lrck in pcm mode. dsd data are output from the dsdol1 - 2 pins and dsdor1 - 2 pins by dclk in dsd mode. dp pin d p bit interface l 0 pcm h 1 dsd table 1 . pcm/dsd m ode control master mode and slave mode t he ak555 4 requires a master clock (mclk), an audio serial data clock (bick) and an output channel clock (lrck) in pcm mode . in this case, the lrck frequency will be the sampling frequency. both master and slave modes are avai lable in pcm mode. in master mode, the ak555 4 internally generates bick and lrck clocks from mclk inputs and outputs them from the bick pin and the lrck pin. mclk must be synchronized with bick and lrck but the phase is not important. the msn pin controls master/slave mode. the ak555 4 is in master mode when the msn pin = h and in slave mode when the msn pin = l. the ak555 4 requires a master clock (mclk) in dsd mode. slave mode is not available in dsd mode, o nly m aster mode is supported . system clock [1] pcm mode the external system clocks, which are required to operate the ak555 4 , are mclk, bick and lrck in pcm mode. mclk frequency is determined based on lrck frequency, according to the operation mode. table 2 , table 3 and table 4 show mclk frequencies correspond to the normal audio rate. set the frequency ratio between sampling frequency and mclk by the cks3 - 0 pins ( table 5 ). all channels must be reset when changing the clock mode or audio interface format by the cks2 - 0 pin s (bit s ), tdm1 - 0 pin s (bit s ), dif1 - 0 pin s (bit s ) and the msn pin . in parallel control mode, all channels will be reset by the pdn pin = l or pw2 - 0 pins = lll . in serial control mode, all channels will be reset by rstn bit = 0 or pw4 - 1 bits = 0h . a stable clock must be supplied after releasing the reset. the ak555 4 integrates a phase detect ion circuit for lrck. if the interna l timing becomes out of synchronization in slave mode, the ak555 4 is reset automatically and the phase is resynchronized. the following sequence must be executed when synchronizing multiple ak555 4 s. stop all ak555 4 s in reset status by setting the pdn pin = l h after stopping the system clock. make pin or register settings while all channels are in reset status . after that, input the same system clock to all ak555 4 s. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 32 - fs mclk 32fs 48fs 64fs 96fs 128fs 192 fs 256fs 384fs 512fs 768fs 1024fs 32 khz n/a n/a n/a n/a n/a n/a 8.192 mhz 12.288 mhz 16.384 mhz 24.576 mhz 32.768 mhz 48 khz n/a n/a n/a n/a n/a n/a 12.288 mhz 18.432 mhz 24.576 mhz 36.864 mhz n/a 96 khz n/a n/a n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/ a n/a n/a 192 khz n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a 384 khz n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a n/a n/a 768 khz 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a n/a n/a n/a n/a (n/a: not available) table 2 system clock example (slave m ode) fs mclk 32fs 48fs 64fs 96fs 128fs 192fs 256fs 384fs 512fs 768fs 1024fs 32 khz n/a n/a n/a n/a n/a n/a 8.192 mhz 12.288 mhz 16.384 mhz 24.576 mhz 32.768 mhz 48 khz n/a n/a n/a n/a n/a n/a 12.288 mhz 18.432 m hz 24.576 mhz 36.864 mhz n/a 96 khz n/a n/a n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a 192 khz n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a 384 khz n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a n/a n/a 768 khz 24.576 mhz 36.864 mhz 49.152 mhz n/a n/a n/a n/a n/a n/a n/a n/a (n/a: not available) table 3 . system clock example (master m ode) fs mclk 32fs 48fs 64fs 96fs 128fs 192fs 256fs 384fs 512fs 768fs 1024fs 32 khz n/a n/a n/a n/a n/a n/a n/a n/a 16. 384 mhz 24.576 mhz 32.768 mhz 48 khz n/a n/a n/a n/a n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a 96 khz n/a n/a n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a 192 khz n/a n/a n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a 384 khz n/a n/a 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a n/a n/a 768 khz 24.576 mhz 36.864 mhz n/a n/a n/a n/a n/a n/a n/a n/a n/a (n/a: not available) table 4 . system clock example (auto m ode) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 33 - cks3 pin(bit) cks2 pin (bit) cks1 pin (bit) cks0 pin (bit) m s n p in mclk frequency speed mode fs range l(0) l(0) l(0) l(0) l 128fs 24m quad speed 108 k hz ? fs ? 216 k hz h l(0) l(0) l(0) h (1) l 192fs 36m quad speed 108 k hz ? fs ? 216 k hz h l(0) l(0) h (1) l(0) l 256fs 12m normal speed 8 k hz ? fs ? 54 k hz h l(0) l(0) h (1) h (1) l 256fs 24m double speed 54 k hz ? fs ? 108 k hz h l(0) h (1) l(0) l(0) l 384fs 36m double speed 54 k hz ? fs ? 108 k hz h l(0) h (1) l(0) h (1) l 384fs 18m normal speed 8 k hz ? fs ? 54 k hz h l(0) h (1) h (1 ) l(0) l 512fs 24m normal speed 8 k hz ? fs ? 54 k hz h l(0) h (1) h (1) h (1) l 768fs 36m normal speed 8 k hz ? fs ? 54 k hz h h (1) l(0) l(0) l(0) l 64fs 24m oct speed fs = 384 khz h h (1) l(0) l(0) h (1) l 32fs 24m hex speed fs = 768 khz h h (1) l(0) h (1) l(0) l 96fs 36m oct speed fs = 384 khz h h (1) l(0) h (1) h (1) l 48fs 36m hex speed fs = 768 khz h h (1) h (1) l(0) l(0) l na na h 64fs 49.1m hex speed fs = 768 khz h (1) h (1) l(0) h (1) l 1024fs 32m normal speed 8 khz fs 32 khz h h (1) h (1) h (1) l(0) l na na h h (1) h (1) h (1) h (1) l auto 8 k hz ? fs ? 216khz fs = 384khz, 768 k hz h na na table 5 . clock mode ( fs & mclk frequency ) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 34 - [ 2 ] dsd mode the ak555 4 only supports mast er mode in dsd mode. the external clock, which is required to operate the ak555 4 , is mclk in dsd mode. t h e ak555 4 generates dclk from mclk inputs and dsd data outputs (dsdol1 - 2 and dsdor1 - 2 ) are synchronized with dclk. the necessary mclk frequencies are 5 12fs and 768fs (fs=32 khz, 44.1 khz, 48 khz). mclk frequency can be changed by the dcks pin (bit). after exiting res et (pdn pin = l h) upon power - up, the ak555 4 is in power - down state until mclk is input. dcks pin (bit) mclk frequency (default) l(0) 512fs h(1) 768fs table 6 . system clock (dsd m ode) the ak555 4 supports 64fs, 128fs a nd 256fs dsd sampling frequencies (fs= 32 khz 44.1 khz, 48 khz). dsdsel1 - 0 pins (bits) control this setting ( table 7 ). dsdsel1 pin (bit) dsdsel0 pin (bit) frequency mode dsd sampling frequency fs= 32 khz fs = 44.1 khz fs= 48 khz l(0) l(0) 64fs 2.048 mhz 2.8224 mhz 3.072 mhz (default) l(0) h(1) 128fs 4.096 mhz 5.6448 mhz 6.144 mhz h(1) l(0) 256fs 8.192 mhz 11.2896 mhz 12.288 mhz h(1) h(1) - reserved reserved reserved table 7 . d sd sampling frequency s elect audio interface format tdm1 - 0 pins(bits), dif 1 - 0 pins( bits ) , slow pin(bit) and sd pin ( bit ) settings should be changed when all channel are reset condition . [1] pcm mode 48 typ es of audio interface format can be selected b y the tdm1 - 0 pins (bits), msn pin and dif1 - 0 pins (bits) ( table 8 , table 9 ). in all formats the serial data is msb-first, 2's complement form at. in master mode , the sdto1 - 2 is clocked out on the falling edge of bick. normal output in slave mode , the sdto1 - 2 is clocked out on the falling edge of bick if 8 khz fs 216 khz. in other conditions, the data is clocked out on the prior rising edge of bick to compensate for some delay that renders the edge of data transition near bick falling edge. audio interface format is distinguished in four types: normal m ode, tdm128 mode, tdm256 mode and tdm512 mode are available . t he tdm1 - 0 pins (bits) select these modes. in normal mod e ( non tdm) , ain1 and ain2 a / d converted data is output from the sdto1 pin, ain3 and ain4 a/d converted data is output from the sdto2 pin . the bick frequency must be in the rage from 48fs to 128fs (fs= 48 khz) in slave mode if the audio interface format is in n ormal output ( non tdm ) and the interface speed is in normal, double or quad mode. bit length of a/d data is 24 - bit or 32 - bit and it is selected by the dif1 pin (bit). the bick frequency must be set to 32fs, 48fs or 64fs in slave mode if the audio interface format is normal output ( non tdm) and the interface speed is in oct mode. bit length of a/d data is determined by bick frequency regardless of the dif1 pin (bit) if the bick frequency is 32fs or 48fs. it is 16 - bit when the bick frequency is 32fs and 24 - bit when the bick frequency is 48fs. when the bick frequency is 64fs, a/d data can be selected between 24 - bit and 32 - bit by the di f1 pin (bit). [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 35 - the bick frequency must be set to 32fs or 48fs in slave mode if the audio interface format is normal output (non tdm) and the interface speed is in hex mode. bit length of a/d data is determined by bick frequency regardless of the dif1 pin (bit). it is 16 - bit when the bick frequency is 32fs and 24 - bit when the bick frequency is 48fs. the bick frequency will be 64fs in master mode if t he audio interface format is normal output ( non tdm) and the interface speed is normal, double or quad mode. data bit length can be selected from 24 - bit and 32 - bit by the dif1 pin (bit). the mclk frequency must be 64fs or 96fs in master mode if the audio interface format is normal output (non tdm) and the interface speed is oct mode. the bick frequency will be 64fs. data bit length can be selected from 24 - bit and 32 - bit by the dif1 pin (bit). the bick frequency will be synchronized with the mclk frequency in master mode if the audio interface format is normal output (non tdm) and the interface speed is hex mod e. the mclk frequency must be 32fs, 48fs or 64fs. the bit length of a/d data is 16 - bit when the mclk frequen cy is 32fs, 24 - bit when the mclk frequency is 48fs and 24 - bit or 32 - bit can be selected by the dif1 pin (bit) when the mclk frequency is 64fs. t h e dif0 pin selects the a/d data format between msb justified an d i 2 s com patible. no. multiplex mode speed mode tdm1 pin(bit) tdm0 pin(bit) msn p in dif1 pin(bit) dif0 pin(bit) sdto lrck bick mclk pol. i/o freq. i/o freq. i/o 0 normal normal doub le quad l(0) l(0) l l(0) l(0) 24 - bit, msb h/l i 48 - 128fs i 128 - 1024fs i 1 l(0) h(1) 24 - bit, i 2 s l/h i 48 - 128fs i 128 - 1024fs i 2 h(1) l(0) 32 - bit, msb h/l i 64 - 128fs i 128 - 1024fs i 3 h(1) h(1) 32 - bit, i 2 s l/h i 64 - 128fs i 128 - 1024fs i 4 h l(0) l(0) 24 - bit, msb h/l o 64fs o 128 - 1024fs i 5 l(0) h(1) 24 - bit, i 2 s l/h o 64fs o 128 - 1024fs i 6 h(1) l(0) 32 - bit, msb h/l o 64fs o 128 - 1024fs i 7 h(1) h(1) 32 - bit, i 2 s l/h o 64fs o 128 - 1024fs i 8 oct hex l(0) l(0) l * l(0) 16 - b it, msb h/l 32fs i 32 - 96fs i 9 * h(1) 16 - bit, i 2 s l/h 32fs i 32 - 96fs i 10 * l(0) 24 - bit, msb h/l 48fs i 32 - 96fs i 11 * h(1) 24 - bit, i 2 s l/h 48fs i 32 - 96fs i 12 l(0) l(0) 24 - bit, msb h/l 64fs i 32 - 96fs i 13 l(0) h(1) 24 - bit, i 2 s l/h 64fs i 32 - 96fs i 14 h(1) l(0) 32 - bit, msb h/l 64fs i 32 - 96fs i 15 h(1) h(1) 32 - bit, i 2 s l/h 64fs i 32 - 96fs i 16 h * l(0) 16 - bit, msb h/l 32fs o 32fs i 17 * h(1) 16 - bit, i 2 s l/h 32fs o 32fs i 18 * l(0) 24 - bit, msb h/l 48fs o 48fs i 19 * h(1) 24 - bit, i 2 s l/h 48fs o 48fs i 20 l(0) l(0) 24 - bit, msb h/l 64fs o 64 - 96 fs i 21 l(0) h(1) 24 - bit, i 2 s l/h 64fs o 64 - 96 fs i 22 h(1) l(0) 32 - bit, msb h/l 64fs o 64 - 96 fs i 23 h(1) h(1) 32 - bit, i 2 s l/h 64fs o 64 - 96 fs i table 8 . audio interface format (norm al m ode ) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 36 - no. multiplex mode speed mode tdm1 pin(bit) tdm0 pin(bit) msn pin dif1 pin(bit) dif0 pin(bit) sdto lrck bick mclk edg. i/o freq. i/o freq. i/o 24 tdm128 normal double quad l(0) h(1) l l(0) l(0) 24 - bit, msb i 128fs i 128 - 1024fs i 25 l(0) h(1) 24 - bit, i 2 s i 128fs i 128 - 1024fs i 26 h(1) l(0) 32 - bit, msb i 128fs i 128 - 1024fs i 27 h(1) h(1) 32 - bit, i 2 s i 128fs i 12 8 - 1024fs i 28 h l(0) l(0) 24 - bit, msb o 128fs o 128 - 1024fs i 29 l(0) h(1) 24 - bit, i 2 s o 128fs o 128 - 1024fs i 30 h(1) l(0) 32 - bit, msb o 128fs o 128 - 1024fs i 31 h(1) h(1) 32 - bit, i 2 s o 128fs o 128 - 1024fs i 32 tdm256 normal do uble h(1) l(0) l l(0) l(0) 24 - bit, msb i 256fs i 256 - 1024fs i 33 l(0) h(1) 24 - bit, i 2 s i 256fs i 256 - 1024fs i 34 h(1) l(0) 32 - bit, msb i 256fs i 256 - 1024fs i 35 h(1) h(1) 32 - bit, i 2 s i 256fs i 256 - 1024fs i 36 h l(0) l(0) 24 - b it, msb o 256fs o 256 - 1024fs i 37 l(0) h(1) 24 - bit, i 2 s o 256fs o 256 - 1024fs i 38 h(1) l(0) 32 - bit, msb o 256fs o 256 - 1024fs i 39 h(1) h(1) 32 - bit, i 2 s o 256fs o 256 - 1024fs i 40 tdm512 normal h(1) h(1) l l(0) l(0) 24 - bit, msb i 512fs i 256 - 1024fs i 4 1 l(0) h(1) 24 - bit, i 2 s i 512fs i 256 - 1024fs i 4 2 h(1) l(0) 32 - bit, msb i 512fs i 256 - 1024fs i 4 3 h(1) h(1) 32 - bit, i 2 s i 512fs i 256 - 1024fs i 4 4 h l(0) l(0) 24 - bit, msb o 512fs o 512 - 1024fs i 4 5 l(0) h(1) 24 - bit, i 2 s o 512fs o 512 - 1024fs i 4 6 h(1) l(0) 32 - bit, msb o 512fs o 512 - 1024fs i 4 7 h(1) h(1) 32 - bit, i 2 s o 512fs o 512 - 1024fs i table 9 . audio interface format (tdm m ode) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 37 - cascade connection in tdm m ode the ak555 4 support s cascade connec tion in tdm mode . all a/d converted data of connected ak555 4 are output from the sdto1 pin of the last ak555 4 by cas cade connection. when the odp pin = l , a cascade connection of one devices in tdm128 mode, two dev ices in tdm256 mode and four devices in tdm512 mode are supported. figure 29 shows a connection example. when the odp pin = h , a cascade connection of two up to sixteen devices is available. when using multiple devices in slave mode on cascade connection, internal operation timing of each device may differ for one mclk cycle depending on mclk and bick input timings. to prevent this timing difference, bick should be more than 10ns from mclk as shown in table 10 . to realize this timing, bick divided by two should be input on a falling edge of mclk as shown in figure 54 when mclk=2xbick (normal speed 1024fs mode). when mclk= bick (normal speed 512fs mode), mclk and bick should be input in - phase as shown in figure 55 to satisfy the timing shown in table 10 . figure 29 . cascade connection 48khz 256 fs 8 ch tdm gnd lrck ak55 5 4 #1 bick tdmi n sdto 1 mclk lrck ak5 5 5 4 #2 bick tdmi n sdto 1 mclk 48khz 512fs 16ch tdm 2 56fs, 512fs or 1024fs gnd lrck ak55 5 4 #1 bick tdmi n sdto1 mclk lrck ak55 5 4 #2 bick tdmi n sdto1 mclk lrck ak55 5 4 #3 bick tdmi n sdto1 mclk lrck ak55 5 4 #4 bick tdmi n sdto1 mclk t dm256 tdm512 slave mode slave mode master mode slave mode slave mode slave mode [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 38 - figure 30 . mode 0/4 timing (normal m ode, normal/double/quad speed m ode, msb justified, 24 - bit) figure 31 . mode 1/5 timing (normal m ode, normal/double/quad speed m ode, i 2 s compatible, 24 - bit) figure 32 . mode 2/6 timing (normal m ode, normal/double/quad speed m ode, msb justified, 32 - bit) figure 33 . mode 3/7 timing (normal m ode, normal/double/quad speed m ode, i 2 s compatible, 32 - bit) lrck bick(64fs) sdto 1 /2 0 1 2 11 12 13 23 2 4 31 0 1 2 11 12 13 23 24 31 0 23 1 22 23 22 13 12 11 31 ain1/3 data 13 12 0 23 : msb, 0: lsb 11 1 1 0 ain2/4 data lrck bick(64 fs) sdto 1 /2 0 1 2 3 2 2 2 3 2 4 2 5 0 0 1 31 29 30 23 : msb, 0: lsb ain1/3 data 0 2 3 22 23 24 2 5 31 29 30 1 1 23 23 22 2 1 0 ain2/4 data 22 2 lrck bick(64fs) sdto 1 /2 0 1 2 11 12 13 20 21 31 0 1 2 12 13 14 24 25 31 0 31 1 30 3 1 30 22 20 19 31 ain1 /3 data ain2 /4 data 22 20 1 1 31 : msb, 0: lsb 1 0 19 1 2 0 12 11 1 lrck bick(64fs) sdto 1 /2 0 1 2 3 23 24 25 26 0 0 1 31 29 30 3 1 30 31 : msb, 0: lsb ain1/3 data ain2/4 data 14 2 3 23 24 25 26 0 31 29 30 1 0 1 2 3 15 16 31 30 16 15 14 3 1 2 0 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 39 - figure 34 . mode 8/16 timing (normal m ode, oct/hex speed m ode, ms b justified, 16 - bit) figure 35 . mode 9/17 timing (normal m ode, oct/hex speed m ode, i 2 s compatible, 16 - bit) figure 36 . mode 10/18 timing (normal m ode , oct/hex speed m ode, msb justified, 24 - bit) figure 37 . mode 11/19 timing (normal m ode, oct/hex speed m ode, i 2 s compatible, 24 - bit) lrck (slave) bick ( 32 fs) sdto1 - 2 (o) 14 9 ain1/3 data 16 bick 32 bick 6 1 0 14 9 a in2/4 data 16 bick 6 1 lrck (master) 14 15 8 7 0 15 8 7 0 15 lrck (slave) bick ( 32 fs) sdto1 - 2 (o) 14 9 ain1/3/5 data 16 bick 32 bick 6 1 0 14 9 ain2/4/6 data 16 bick 6 1 lrck (master) 14 15 8 7 0 15 8 7 0 15 lrck (slave) bick ( 48 fs) sdto1 - 2 (o) 22 13 ain1/3 data 24 bick 48 bick 10 1 0 22 13 ain2/4 data 24 bick 10 1 lrck (master) 22 23 12 11 0 23 12 11 0 23 lrck (slave) bick ( 48 fs) sdto1 - 2 (o) 22 13 ain1/3 data 24 bick 48 bick 10 1 0 22 13 ain2/4 data 24 bick 10 1 lrck (master) 22 23 12 11 0 23 12 11 0 23 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 40 - figure 38 . mode 12/20 timing (normal m ode, oct/hex speed m ode, msb justified, 24 - bit) figure 39 . mode 13/21 timing (normal m ode, oct/hex speed m ode, i 2 s compatible, 24 - bit) figure 40 . mode 14/22 timing (normal m ode, oct/hex speed m ode, msb justified, 32 - bit) figure 41 . mode 15/23 timing (normal m ode, oct/hex speed m ode, i 2 s compatible, 32 - bit) lrck (slave) bick ( 64 fs) sdto1 - 2 (o) 22 ain1/3 data 32 bick 64 bick 7 0 22 1 5 ain2/4 data 32 bick 7 0 lrck (master) 22 23 8 23 8 23 1 5 lrck (slave) bick ( 64 fs ) sdto1 - 2 (o) 22 1 5 ain1/3 data 32 bick 64 bick 7 0 22 1 5 ain2/4 data 32 bick 7 0 lrck (master) 22 23 8 23 8 23 lrck (slave) bick ( 64 fs) sdto1 - 2 (o) 30 17 ain1/3 data 32 bick 64 bick 1 4 1 0 30 1 7 ain2/4 data 32 bick 1 4 1 lrck (master) 30 31 16 15 0 31 1 6 1 5 0 31 lrck (slave) bick ( 64 fs) sdto1 - 2 (o) 30 1 7 ain1/3 data 32 bick 64 bick 1 4 1 0 30 17 ain2/4 data 32 bick 1 4 1 lrck (master) 30 31 1 6 1 5 0 31 1 6 1 5 0 31 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 41 - figure 42 . mode 24/28 timing (tdm128 m ode, msb justified, 24 - bit) figure 43 . mode 25/29 timing (tdm128 m ode, i 2 s compatible) figure 44 . mode 26/30 timing (tdm128 m ode, msb justified) lrck (slave) bick (256fs) sdto1 (o) 22 0 data 1 32 bick 128 bick 22 0 data 2 32 bick 22 0 data 3 32 bick 22 0 data 4 32 bick lrck (master) 22 23 23 23 23 23 s dto2 (o) lrck (slave) bick (256fs) sdto1 (o) 22 0 data 1 32 bick 128 bick 22 0 data 2 32 bick 22 0 data 3 32 bick 22 0 data 4 32 bick lrck (master) 22 23 23 23 23 23 s dto2 (o) lrck (slave) bick (256fs) sdto1 (o) 30 1 data 1 32 bick 128 bick 30 1 data 2 32 bick 0 30 1 data 3 32 bick 30 1 data 4 32 bick lrck (master) 30 sdto2 (o) 31 0 31 0 31 0 31 0 31 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 42 - figure 45 . mode 27/31 timing (tdm128 m ode, i 2 s compatible) figure 46 . mode 32/36 timing (t dm256 m ode, msb justified, 24 - bit) figure 47 . mode 33/37 timing (tdm256 m ode, i 2 s compatible, 24 - bit) lrck (slave) bick (256fs) sdto1 (o) 30 1 data 1 32 bick 128 bick 30 1 data 2 32 bick 0 30 1 data 3 32 bick 30 1 data 4 32 bick lrck (master) 30 sdto2 (o) 31 0 31 0 31 0 31 0 31 lrck (slave) bick (256fs) sdto1 (o) 22 0 #2 data 1 32 bick 256 bick 22 0 #2 data 2 32 bick 2 2 22 0 #2 data 3 32 bick 22 0 #2 data 4 32 bick lrck (master) tdmi n (i) (#1 sdto1) 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick sdto2 (o) 23 23 23 23 23 23 23 23 23 23 23 23 23 23 lrck (slave) bick (256fs) sdto1 (o) 22 0 #2 data 1 32 bick 256 bick 22 0 #2 data 2 32 bick 22 0 #2 data 3 32 bick 22 0 #2 data 4 32 bick lrck (master) tdmi n (i) (#1 sdto1) 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick 22 0 #1 data 1 32 b ick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick sdto2 (o) 23 23 23 23 23 23 23 23 23 23 23 23 23 23 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 43 - figure 48 . mode 34/38 timing (tdm256 m ode, msb just ified, 32 - bit) figure 49 . mode 35/39 timing (tdm256 m ode, i 2 s compatible, 32 - bit) figure 50 . mode 40/44 timing (tdm512 m ode, msb justified, 24 - bit) lrck (slave) bick (256fs) sdto1 (o) 30 1 #2 data 1 32 bick 256 bick 30 1 #2 data 2 32 bick 30 30 1 #2 data 3 32 bick 30 1 #2 data 4 32 bick lrck (master) tdmi n (i) (#1 sdto1) 30 1 #1 data 1 32 bick 30 1 #1 data 2 32 bick 30 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick 30 1 #1 data 1 32 bick 30 1 #1 data 2 32 bick 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick sdto2 (o) 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 31 0 31 0 31 0 31 0 31 lrck (slave) bick (256fs) sdto1 (o) 30 1 #2 data 1 32 bick 256 bick 30 1 #2 data 2 32 bick 0 30 1 #2 data 3 32 bick 30 1 #2 data 4 32 bick lrck (master) tdmi n (i) (#1 sdto1) 30 1 #1 data 1 32 bick 30 #1 data 2 32 bick 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick 30 1 #1 data 1 32 bick 30 1 #1 data 2 32 bick 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick sdto2 (o) 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 31 0 31 0 31 0 31 0 31 lrck (slave) bick ( 512 fs) sdto1 (o) 22 0 # 4 data 1 32 bick 512 bick 33 0 # 4 data 2 32 bick 22 0 # 4 data 3 32 bick 22 0 # 4 data 4 32 bick lrck (master) tdmi n (i) (# 3 sdto1) 22 0 # 3 data 1 32 bick 22 0 # 3 data 2 32 bick 30 22 0 # 3 data 3 32 bick 22 0 # 3 data 4 32 bick 22 0 # 3 data 1 32 bick 22 0 # 3 data 2 32 bick 22 0 # 3 data 3 32 bick 22 0 # 3 data 4 32 bick sdto2 (o) 22 0 # 2 data 1 32 bick 22 0 # 2 data 2 32 bick 22 0 # 2 data 3 32 bick 22 0 # 2 data4 32 bick 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick 22 0 # 2 data 1 32 bick 22 0 # 2 data 2 32 bick 22 0 # 2 data 3 32 bick 22 0 # 2 data 4 32 bick 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 31 22 23 23 23 23 23 23 23 23 23 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick 23 23 23 23 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 44 - figure 51 . mode 41/45 timing (tdm512 m ode, i 2 s compatible, 24 - bit) figure 52 . mode 42/46 timing (tdm512 m ode, msb justified, 32 - bit) figu re 53 . mode 43/47 timing (tdm512 m ode, i 2 s compatible, 32 - bit) parameter symbol min. typ. max unit mclk to bick bick to mclk lrck (slave) bick ( 512 fs) sdto1 (o) 22 0 # 4 data 1 32 bick 512 bick 22 0 # 4 data 2 32 bick 22 0 # 4 data 3 32 bick 22 0 # 4 data 4 32 bick lrck (master) tdmi n (i) (# 3 sdto1) 22 0 # 3 data 1 32 bick 22 0 # 3 data 2 32 bick 22 0 # 3 data 3 32 bick 22 0 # 3 data 4 32 bick 22 0 # 3 data 5 32 bi ck 22 0 # 3 data 6 32 bick 22 0 # 3 data 7 32 bick 22 0 # 3 data 8 32 bick sdto2 (o) 22 0 # 2 data 1 32 bick 22 0 # 2 data 2 32 bick 22 0 # 2 data 3 32 bick 22 0 # 2 d ata4 32 bick 22 0 #1 data 1 32 bick 22 0 #1 data 2 32 bick 22 0 #1 data 3 32 bick 22 0 #1 data 4 32 bick 22 0 # 2 data 1 32 bick 22 0 # 2 data 2 32 bick 22 0 # 2 data 3 32 bick 22 0 # 2 data 4 32 bick 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 22 0 # 1 data 1 32 bick 22 0 # 1 data 2 32 bick 22 0 # 1 data 3 32 bick 22 0 # 1 data 4 32 bick 23 23 23 23 lrck (slave) bick ( 512 fs) sdto1 (o) 30 1 # 4 data 1 32 bick 512 bick 3 0 1 # 4 data 2 32 bick 30 1 # 4 data 3 32 bick 30 1 # 4 data 4 32 bick lrck (master) tdmi n (i) (# 3 sdto1) # 3 data 1 32 bick # 3 data 2 32 bick # 3 data 3 32 bick # 3 data 4 32 bick 30 1 # 3 data 1 32 bick 30 1 # 3 data 2 32 bick 30 1 # 3 data 3 32 bick 30 1 # 3 data 4 32 bick sdto2 (o) 30 1 # 2 data 1 32 bick 30 1 # 2 data 2 32 bick 30 1 # 2 data 3 32 bick 30 1 # 2 data4 32 bick 30 1 #1 data 1 32 bick 30 1 #1 data 2 32 bick 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick # 2 data 1 32 bick # 2 data 2 32 bick # 2 data 3 32 bick # 2 data 4 32 bick 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 30 31 #1 data 1 32 bick #1 data 2 32 bick #1 data 3 32 bick #1 d ata 4 32 bick 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 30 1 30 1 30 1 30 1 30 1 30 1 30 1 30 1 30 1 30 1 30 1 30 1 31 31 31 31 31 31 31 31 31 31 31 31 0 0 0 0 0 0 0 0 0 0 0 0 30 31 lrck (slave) bick (256fs) sdto1 (o) 30 1 #4 data 1 32 bick 512 bick 30 1 #4 data 2 32 bick 30 1 #4 data 3 32 bick 30 1 #4 data 4 32 bick lr ck (master) tdmi n (i) (#3 sdto1) 30 1 #3 data 1 32 bick 30 1 #3 data 2 32 bick 30 1 #3 data 3 32 bick 30 1 #3 data 4 32 bick 30 1 #3 data 1 32 bick 30 1 #3 da ta 2 32 bick 30 1 #3 data 3 32 bick 30 1 #3 data 4 32 bick sdto2 (o) 30 1 #2 data 1 32 bick 30 1 #2 data 2 32 bick 30 1 #2 data 3 32 bick 30 1 #2 data4 32 bick 30 1 #1 data 1 32 bick 30 1 #1 data 2 32 bick 30 1 #1 data 3 32 bick 30 1 #1 data 4 32 bick 30 1 # 2 data 1 32 bick 30 1 # 2 data 2 32 bick 30 1 # 2 data 3 32 bick 30 1 # 2 data 4 32 bick 30 1 # 1 data 1 32 bick 30 1 # 1 data 2 32 b ick 30 0 # 1 data 3 32 bick 30 1 # 1 data 4 32 bick 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 31 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 0 31 1 31 0 0 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 45 - figure 54 . audio interface timing (slave m ode, tdm m ode mclk=2bick) figure 55 . audio interface timing (slave m ode, tdm m ode mclk=bick) [2] dsd m od e dsd output is available only when the ak555 4 is in master m ode. the dclk frequency can be selected from 64fs, 128fs and 256fs by setting the dsdsel1 - 0 pins (bits) . t h e ak555 4 enters phase modulation mode by setting pmod pin = h or pmod bit = 1 . it does not support phase modulation mode when the dclk frequency is 256fs. dckb bit controls dclk polarity . figure 56 . dsd mode timing mclk bick tmcb tbim vih vil vih vil mclk bick tmcb tbim vih vil vih vil dclk ( 64fs, 128 fs , 256fs ) dckb bit = 1 dclk ( 64fs, 128 fs , 256fs ) dckb bit = 0 dsd o l, dsd o r normal dsd o l,dsd o r phase modulation d1 d0 d1 d2 d0 d2 d3 d1 d2 d3 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 46 - channel summation (pcm m ode, dsd m ode) channel summation func tion improves the dynamic range and s/n performance by averaging all a/d data of multiple - channel that the same signal is input. the ak555 4 supports 4 - to - 2 mode and 4 - to - 1 mode . 4 - to - 2 m ode (stereo m ode) improve the dynamic range and s/n for 3 db ( 2 db i n dsd mode) by averaging two channels. 4 - to - 1 m ode (mono m ode) improve the dynamic range and s/n for 6 db ( 4 db in dsd mode) by averaging four channels. not - summation m ode ( 2 - stereo m ode) normal mode that does not execute summation is called as not - sum mation mode or 2 - stereo m ode. refer to the section ch power down & channel summation m ode for details. optimal data placement mode (pcm mode, dsd mode) assigned data to the sdto1/2 slot is controlled by t h e odp pin setting in parallel control mode. when the odp pin = l , the data is output by fixed data placement mode. channel assignment of data slot is fixed regardless of enable/dis able of channel summation. for example, averaging data of two channels are output to both channel slots. when the o dp pin = h , the data is output by o ptimal data p lacement mode that is uses data slot more efficiently . in optimal data p lacement mode, there are no data redundant of channel summation, and the data is output in msb justified. therefore, the maximum numbe r of connecting device in cascade connection will be increased. if the ak555 4 is set to 4 - to - 2 mode (stereo mode), two devices can be connected in tdm128 mode, four devices can be connected in tdm256 mode and eight devices c an be connected in tdm512 mode. if the ak555 4 is set to 4 - to - 1 mode (mono mode), four devices can be connected in tdm128 mode, eight devices can be connected in tdm256 mode and sixteen devices can be connected in tdm512 mode. in serial control mode, the data output is optimal data pla cement mode regardless of the odp pin setting. refer to ch power down & channel summation m ode for details. ch power down & channel summation (pcm m ode, dsd m ode) [1] parallel mode the setting of the pw 2 - 0 pins and the odp pin control s the channe l power - down and channel summation mode setting in parallel mode ( tab le 11 - table 16 ). the pdn pin must be set to l when changing the odp pin and the pw 2 - 0 pins. the pow er consump tion of the device can be improved by setting unused channels to power - down state. in this case, the channel circuit that is powered down will be res e t . when the odp pin = l , the pw 2 - 0 pins control channel power - down and 4 - to - 2 mode. in 4 - to - 2 mode , ain1 and ain2 channel data are summed digitally and output from the sdto1 (dsd o l 1 and dsd o r 1) by dividing into half amplitude. in the same manner, ain3 and ain4 channel data are summed digitally and output from the sdto2 (ds d ol 2 and dsd or 2) by divi ding into half amplitude. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 47 - pw2 pin pw1 pin pw0 pin power on/off ch4 ch3 ch2 ch1 l l l off off off off l l h on on off off l h l off off on on l h h on on on on h l l off on on on h l h on on off off h h l off off on on h h h on on on on tab le 11 . channel power on/off (parallel control mode, odp pin= l) pw2 pin pw1 pin pw0 pin data on slot slot 4 slot 3 slot 2 slot 1 l l l all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 l) when the odp pin = h , the ak555 4 becomes optimal data placement mode and data slot s can be used efficiently. the pw2 - 0 pins control power down, 4 - to - 2 mode and 4 - to - 1 mode . in 4 - to - 2 mode , ain1 and ain2 channel data are summed d igitally and output from the sdto1 (dsd ol 1 ) by dividing into half amplitude. in the same manner, ain3 and ain4 channel data are summed dig itally and output from the sdto 1 (dsd or 2 ) by dividing into half amplitude. i n 4 - to - 1 mode , ain1 - ain 4 channel data a re summed digitally and output f rom the sdto1 (dsd ol 1 ) of the slot1 by dividing into quarter amplitude. pw2 pin pw1 pin pw0 pin power on/off ch4 ch3 ch2 ch1 l l l off off off off l l h on on on on l h l on on on on l h h on on on on h l l on on on on h l h on on on on h h l on on on on h h h on on on on table 13 . channel power on/off (parallel control m ode, odp pin= h) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 48 - pw2 pin pw1 pin pw0 pin data on slot slot 4 slot 3 slot 2 slot 1 l l l all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 all 0 h, normal output) pw2 pin pw1 pin pw0 pin data on slot slot 4 slot 3 slot 2 slot 1 l l l all 0 all 0 all 0 all 0 h, tdm128) pw2 pin pw1 pin pw0 pin data on slot slot 4 slot 3 slot 2 slot 1 l l l all 0 all 0 all 0 all 0 h, tdm256 & tdm512) [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 49 - [2] serial mode in 3 - wire serial mode or i 2 c mode , pw1 - 4 bits control the power of ain1 - 4 channels independently . ainn channel is powered down when pwn bit = 0 (n=1 - 4 ) and ainn channel is in normal operation when pwn bit = 1. the power - down channel is reset status and outputs all 0 . the channe l summation is controlled by mono1 and mono2 bits. rstn bit must be 0 when changing the setting of mono1, mono2 and pw1 - 4 bits . mono2 bit mono1 bit data on slot (normal output) slot 4 slot 3 slot 2 slot 1 0 0 ch4 ch3 ch2 ch1 0 1 all 0 all 0 all 0 all 0 all 0 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 50 - data slot configuration [1] pcm mode figure 57 . slot assign in pcm m ode [2] dsd m ode figure 58 . slot assign in ds d m ode dsdol1 pin slot 1 lrck period = 1/fs slot 2 slot 3 slot 4 dsdor1 pin dsdol2 pin dsdor2 pin sdto1 pin slot 1 slot 3 slot 2 slot 4 slot 1 all 0 all 0 all 0 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 51 - digital filter setting (pcm mode) the ak555 4 has four types of digital filters and they can be selected by sd pin (bit) and slow pin (bit) . the filter setting is not available in oct speed mode, hex speed mode and dsd mode. so the setting of the digital filter is ignored. sd pin (bit) slow pin (bit) filter l (0) l (0) sharp roll - off filter l (0) h (1) slow roll - off filter h (1) l (0) short delay sharp roll - off filter h (1) h (1) short delay slow roll - off filter table 20 . digital filter setting digital hpf ( pcm mode ) the ak555 4 has a digital high - pass filter for dc offset (include internal offset) cancelation . t h e digital high - pass filter is enabled by setting the hpfe pin (bit) = h (1) . the cut - off frequency of the high - pass filter is fixed 1.0 hz when fs= 48khz (normal speed m ode), 96 khz (double speed m ode) or 192 khz (quad speed m ode) . the high - pass filter is not available in oct speed mode, hex speed mode and dsd mode. so that the setting of the hpfe pin is ignored. the high pass - filter setting should be changed when all channels are reset condition . overflow detection (pcm mode , dsd mode) [1] pcm m ode the ak555 4 has an overflow detect function for the analog input. the ovf pin outputs h if one of ain1 - 4 channel overflows (more than ? 0.3 dbfs). the ovf pin returns to l when analog input overfl ows are resolved. the ovf output for overflowed analog input has the same group delay as the adc. [2] dsd m ode overflow detection ( error detection function ) the ovf pin outputs h if any channel s dsd modulators overflows. the ovf pin returns to l whe n overflows are resolved. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 52 - ldo t he voltage range of tvdd is from 1.7 v to 1.98 v or from 3.0 v to 3.6 v. set on/off of the ldo by the ldoe pin according to tvdd voltage ( table 21 ) . the internal ldo is switched on/off depending on tvdd vo ltage range. ldoe pdn ldo vdd18 pin additional voltage range to tvdd pin l l off external power input 1.7 - 1.98 v 1.7 - 1.98 v l h off external power input 1.7 - 1.98 v 1.7 - 1.98 v h l off pull ed down by 500 ? (ldoe pin = l) the internal ldo does not work properly when the tvdd voltage range is from 1.7 v to 1.98 v . set the ldoe pin to l to switch off the ldo. a 1.7 v - 1.98 v is supplied from the vdd18 pin for internal logic circuits. the voltage difference between tvdd and vdd18 must be 0.1 v or less. [2] tvdd=3.0 - 3.6 v, l do is on (ldoe pin = h) the internal ldo should be on when the tvdd voltage range is from 3.0 v to 3.6 v. it will be the power supply for the internal logic circuit. the vdd18 pin will be a connection terminal for a stabilization capacitor. it is not possible to supply the power to externa l circuits from the vdd18 pin. reset the ak555 4 must be reset upon power up or when changing the clock setting or clock frequency. it can be reset by the pdn pin and pw2 - 0 pins or rstn bit and pw4 - 1 bits. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 53 - power down function / sequence the ak555 4 enters power - down mode by setting the pdn pin to l . digital filters are reset at the same time. [1] pcm mode in slave mode, internal power down signal (internal pdn) is released by inputting mclk, bick and lrck after setting the pdn pin to h . in master mode, the internal pdn is relea sed by inputting mclk after setting the pdn pin to h . initialization cycle starts when the internal pdn is released. t he output data of sdto will be valid in 583 x 1/ fs after exiting power - down mode in slave mode, it will be valid in 578 x 1/ fs after ex iting power - down mode in master mode. during initialization, the adc digital outputs of both channels are in 2 s complement format and forced to 0 . the adc outputs settle to data correspondent to the input signals af ter the end of initialization . this s e ttling takes app roximately the group delay time . figure 59 . power - up / down sequence example notes: (1) the pdn pin should be held to l for more than 150 ns after avdd and tvdd are powered up . (2) a. ld o e pin = h , i2c pin = h and ps n pin = h (parallel mode): t he internal ldo is powered up by releasing pdn pin to h . the i nternal pdn is released by toggling mclk for 16384times . b. ldoe pin = h and psn pin = l (register mode): the internal ldo is powered up by releasing pdn pin to h . the internal pdn is released by toggling internal oscillator clock for 16384 times (max. 10 ms) . c. ldoe pin = l : the internal pdn is released in 1 ms (max.) after releasing pdn pin to h . during this period, di gital output and digital in/output pins may output an instantaneous pulse (max. 1 us). therefore, referring the output of digital pins and data transmission with a device on the same 3 - wire serial/i 2 c bus as the ak555 4 should be avoided in this period to p revent system errors. pdn pin power power - down normal operation clock in mclk,lrck,bick a dc in ( analog ) a d c out ( digital ) don t care 0 data gd ( 3 ) ( 5 ) ( 6 ) gd ( 5 ) 0 data don t care internal state ( 4 ) ( 4 ) (1) i nternal pdn (2) vdd 18 pin initialize power - down idle noise idle noise [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 54 - (3) initializati on cycle is 583/fs in slav e mode and 578 /fs in master mode. (4) the adc output data is 0 during initialization cycle and power - down mode. (5) the digital output corresponding to analog i nput has group delay (gd). internal p dn release sequence figure 60 . internal pdn release sequence ldoe pin=h parallel mode pdn mclk ref_pdn shutdown_sw_n cntup_t internal_pdn ldoe pin=h serial mode pdn mclkdon't care ref_pdn shutdown_sw_n cntup_t internal_pdn ldoe pin = l pdn mclk ref_pdn shutdown_sw_n cntup_t internal_pdn 2048 mclk 14336 mclk (min 280usec mclk=50meg max 7.2msec mclk=2meg) 2048 oscclk 14336 oscclk (min 380usec oscclk=37.5meg max 850usec oscclk=17meg) max 1msec [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 55 - [2] dsd m ode the internal pdn is released by inputting mclk after setting the pdn pin to h . figure 61 . dsd o p eration t iming notes: (1) the internal ldo is powered up by releasing pdn pin to h. the internal pdn is released by toggling internal oscillator clock for 16384 times (max. 10ms). the internal pdn is released in max. 1 ms after releasing pdn pin to h . reg ister writings become available when the internal pdn changes to 1 . during this period, digital output and digital in/output pins may output an instantaneous pulse (max. 1 us). therefore, referring the output of digital pins and data transmission with a device on the same 3 - wire serial/i 2 c bus as the ak555 4 should be avoided in this period to prevent system errors. (2) initialization operation will be completed in 583/fs. (3) dsd output pins output l ( - full scale data) during power down and initializing operat ion . dsd output pins output full scale data during p hase m odulation mode , a reset sequence and a ch power down status. (4) the ovf pin outputs h when an excessive signal is input and overflow is detected at internal modulator. t he ovf pin status will change after group delay period from the excessive input. (5) in the case above (4), the dsd output data will not be correct. (6) the ovf pin returns to l when the input signal settled to a normal state and overflow status of the internal modulator is resolved. t he ovf pin status will change after group delay period from the n ormal input. p dn pin power - d own normal operation mclk in adc in ( analog ) dsd out ( dig ital ) don t care ( 3 ) l ( - full scale data) don t care internal state ( 4 ) (1) (2) initialize power - d own ovf - pin normal data abnormal data normal data l ( - full scale data) (6) (5) i nternal pdn [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 56 - operation mode control operation mode s of the ak555 4 are set by pins or registers. in parallel mode, the operation mode is set by pin and register settings are invalid. therefor e the functions that needs register settings are not availabl e in parallel mode. for register access ing , 3 - wire serial and i 2 c bus communications are available. this control mode of the ak555 4 is selected by the i2c pin and the ps n pin. in serial c ontrol mode , register settings are prioritized so that all pin settin gs except the msn pin setting are ignored. i2c pin ps n pin control mode l l 3 - wire serial l h 3 - wire serial h l i2c bus h h parallel table 22 . control m ode register control interface (1) 3 - wire serial control m ode (i2c pin = l) the internal registers may be written through the 3 - wire p interface pins ( csn , cclk and cdti). the data on this interface consists of a 2 - bit chip address, read/write (1bit, fixed to 1, write only), register address (msb first, 5bits) and cont rol data (msb first, 8bits). a ddress and data are clocked in on the rising edge of cclk and data is clocked out on the falling edge. for write operations, data is latched after a low - to - high transition of csn. the clock speed of cclk is 5mhz (max). the in ternal registers are initialized by setting the pdn pin = l. in serial mode, an internal timing circuit is reset by setting rstn bit = 0 but register values are not initialized. c1 - c0: chip address (c1=cad1, c0=cad0) r/w: read/write (fixed to 1, write only) a4 - a0: register address d7 - d0: control data figure 62 . control i/f timing * the ak555 4 does not support read commands in 3 - wire serial control mode. * when the ak555 4 is in power down mode (pdn pin = l), a writing into the control registers is prohibited. * the control data cannot be written when the cclk rising edge is 15 times or less, or 17 times or more during csn is l. cdti cclk c1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 d4 d5 d6 d7 a1 a2 a3 a4 r/w c0 a0 d0 d1 d2 d3 csn [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 57 - (2) i 2 c - bus control m ode (i2c pin = h and ps n pin = l ) the ak555 4 supports the fast - mode i 2 c - bus (max: 400 khz, ver1.0). (2) - 1. write operations figure 63 shows the data transfer sequence of the i 2 c - bus mode. all commands are preceded by a start condition. a high to lo w transition on the sda line while scl is high indicates a start condition ( figure 69 ). after the start condition, a slave address is sent. this address is 7 bits long followed by the eighth bit that is a data direc tion bit ( r/w). the most significant five bits of the slave address are fixed as 00100. the next bits are cad1 - 0 (device address bits). this bits identifies the specific device on the bus. the hard - wired input pins (cad1 - 0 pins) set these device address bit ( figure 64 ). if the slave address matches that of the ak555 4 , the ak555 4 generates an acknowledge and the operation is executed. the master must generate the acknowledge - related clock pulse and release the sda line (high) during the acknowledge clock pulse ( figure 70 ). r/w bit = 1 indicates that the read operation is to be executed. 0 indicates that the write operation is to be executed. the second byte consists of t he control register address of the ak555 4 . the format is msb first, and those most significant 3 - bits are fixed to zeros ( figure 65 ). the data after the second byte contains control data. the format is msb first, 8b its ( f igure 66 ). the ak555 4 generates an acknowledge after each byte is received. data transfer is always terminated by a stop condition generated by the master. a low to high transition on the sda line while scl is high defines stop condition ( figure 69 ). the ak555 4 can perform more than one byte write operation per sequence. after receipt of the third byte the ak555 4 generates an acknowledge and awaits the next data. the ma ster can transmit more than one byte instead of terminating the write cycle after the first data byte is transferred. after receiving each data packet the internal 6 - bit address counter is incremented by one, and the next data is automatically taken into t he next address. if the address exceeds 07 h prior to generating a stop condition, the address counter will roll over to 00h and the previous data will be overwritten. the data on the sda line must remain stable during the high period of the clock. t he high or low state of the data line can only change when the clock signal on the scl line is low ( figure 71 ) except for the start and stop conditions. figure 63 . data transfer sequence at the i 2 c - bus mode 0 0 1 0 0 cad1 cad0 r/w (cad0 and cad1 are set by pin s ) figure 64 . the first byte 0 0 0 a4 a3 a2 a1 a0 figure 65 . the second byte d7 d6 d5 d4 d3 d2 d1 d0 f igure 66 . byte structure after the second byte 3rd byte 2nd byte 1st byte sda s t a r t a c k a c k s slave address a c k sub address(n) data(n) p s t o p data(n+x) a c k data(n+1) a c k r/w= 0 a c k [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 58 - (2) - 2. read operations set the r/w bit = 1 for the read operation of the ak555 4 . after transmission of data, the master can read the next addresss data by generating an acknowledge instead of terminating the write cycle after the receipt of the first data word. after receiving each data packet the internal 6 - bit address counter is incremented by one, and the next data is automatically taken into the next address. if the address exce eds 0 7 h prior to generating stop condition, the address counter will roll over to 00h and the data of 00h will be read out. the ak555 4 supports two basic read operations: current address read and random address read. (2) - 2 - 1. current address re ad the ak555 4 contains an internal address counter that maintains the address of the last word accessed, incremented by one. therefore, if the last access (either a read or write) was to address n, the next current read operation would access data from t he address n+1. after receipt of the slave address with r/w bit 1, the ak555 4 generates an acknowledge, transmits 1 - byte of data to the address set by the internal address counter and increments the internal address counter by 1. if the master does not generate an acknowledge but generates a stop condition instead, the ak555 4 ceases transmission. figure 67 . current address read (2) - 2 - 2. random address read the random read operation allows the maste r to access any memory location at random. prior to issuing a slave address with the r/w bit =1, the master must execute a dummy write operation first. the master issues a start request, a slave address (r/w bit = 0) and then the register address to read. after the register address is acknowledged, the master immediately reissues the start request and the slave address with the r/w bit =1. the ak555 4 then generates an acknowledge, 1 byte of data and increments the internal address counter by 1. if t he master does not generate an acknowledge but generates a stop condition instead, the ak555 4 ceases transmission. figure 68 . random address read sda s t a r t a c k a c k s slave address a c k data(n+1) p s t o p data( n+x) a c k data(n+2) a c k r/w= 1 a c k data(n) sda s t a r t a c k a c k s slave address a c k data(n) p s t o p data( n+x) a c k data(n+1) a c k r/w= 0 a c k sub address(n) s t a r t a c k s slave address r/w= 1 [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 59 - figure 69 . start and stop conditions figure 70 . acknowledge on the i 2 c - bus figure 71 . bit transfer on the i 2 c - bus scl sda stop condition start condition s p scl from master acknowledge data output by transmitter data output by receiver 1 9 8 start condition not acknowledge clock pulse for acknowledgement s 2 scl sda data line stable; data valid change of data allowed [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 60 - register map addr register n ame d7 d6 d5 d4 d3 d2 d1 d0 00h power management 1 1 1 1 1 p w4 p w3 p w2 p w1 01h power management 2 0 0 0 0 0 mono2 mono 1 rstn 02h control 1 0 cks3 cks2 cks1 cks0 dif1 dif0 hpfe 03h control 2 0 tdm1 tdm0 0 0 0 0 0 04h control 3 dp 0 0 0 0 0 sd slow 05h d sd 0 0 dcks 0 pmod dckb dsdsel1 dsdsel0 06h test1 tst7 tst6 tst5 tst4 tst3 tst2 tst1 tst0 07h test2 0 0 0 0 0 0 0 trst note 24 . data must not be written into addresses from 0 6 h to 1fh . note 25 . the bits indicated as 0 must contain a 0 value. when rstn bit is set to 0, the internal digital filter and the control block are reset but the register values are not initialized. note 26 . when the pdn pin is set to l, all registers are initialized to their default values. register definitions addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management1 1 1 1 1 pw 4 pw 3 pw 2 pw 1 r/w r/w r/w r/w r/w r/w r/w r/w r/w default 1 1 1 1 1 1 1 1 pw 4 - 1 : power down control for channel 4 - 1 0: power off 1: power on (default) addr register name d7 d6 d5 d4 d3 d2 d1 d0 01h power management2 0 0 0 0 0 mono2 mono 1 rstn r/w r/w r/w r/w r/w r/w r/w r/w r/w default 0 0 0 0 0 0 0 1 rstn: internal timing reset 0: reset. all registers are no t initialized. 1: normal operation (default) internal clock timings are reset but registers are not reset. mono2 - 1: channel summation mode select ( table 17 - table 19 ) 00: not - summation m ode (default) 01: 4 - to - 2 m ode 10: not - summation m ode 11: 4 - to - 1 m ode addr register name d7 d6 d5 d4 d3 d2 d1 d0 02h control 1 0 cks3 cks2 cks1 cks0 dif1 dif0 hpfe r/w r/w r/w r/w r/w r/w r/w r/w r/w default 0 0 0 0 0 0 0 1 hpfe : high pass filter enable 0: high pass filter off 1: high pass filter on (default) when this bit is 1, digital hpfs for all channels are on. dif1 - 0: audio data interface modes select ( table 8 , table 9 ) select a/d data bit length (24 - bit/ 32 - bit ) and the format ( msb justified/ i2s compatible ) cks3 - 0: sampling speed mode and mclk frequency select ( table 5 ) select sampling speed and mclk frequency. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 61 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 03h control 2 0 tdm1 tdm0 0 0 0 0 0 r/w r/w r/w r/w r/w r/w r/w r/w r/w default 0 0 0 0 0 0 0 0 tdm1 - 0: tdm modes select ( table 9 ) select the a/d data o utput mode from normal, tdm 128, tdm256 and tdm512 modes . addr register name d7 d6 d5 d4 d3 d2 d1 d0 04h control 3 dp 0 0 0 0 0 sd slow r/w r/w r/w r/w r/w r/w r/w r/w r/w default 0 0 0 0 0 0 0 0 slow: slow roll - off filter select ( table 20 ) 0: sharp roll - off (default) 1: slow roll - off select roll - off characteristic of the digital filter. sd: short delay select ( table 20 ) 0: normal delay (default) 1: short delay sel ect group delay of the digital filter. dp: dsd mode select 0: pcm mode (default) 1: dsd mode select output mode. addr register name d7 d6 d5 d4 d3 d2 d1 d0 0 5 h dsd 0 0 dcks 0 pmod dckb dsdsel1 dsdsel0 r/w r/w r/w r/w r/w r/w r/w r/w r/w default 0 0 0 0 0 0 0 0 dsdsel1 - 0 : select the frequency of dclk 00 : 64fs (default) 01 : 128fs 10 : 256fs 11 : reserved dckb : polarity of dclk 0: dsd data is output from dclk falling edge (default) 1: dsd data is output from dclk rising edge pmod : dsd phase modula tion mode 0 : not phase modulation mode (default) 1 : phase modulation mode dsd output phase modulation mode enable dcks: master clock frequency select at dsd mode (dsd only) 0: 512fs (default) 1: 768fs [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 62 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 06h test 1 tst7 tst6 tst5 tst4 tst3 tst2 tst1 tst0 r/w rd rd rd rd rd rd rd rd default 0 0 0 0 0 0 0 0 tst7 - 0 : test register. this register must be used as the default setting. normal operation is not guaranteed if all bits are not 0 . addr register name d7 d 6 d5 d4 d3 d2 d1 d0 07h test 2 0 0 0 0 0 0 0 trst r/w r/w r/w r/w r/w r/w r/w r/w w default 0 0 0 0 0 0 0 0 trst : test register. this register must be 0. this register must be used as the default setting. normal operation is not guaranteed if all bi ts are not 0 . [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 63 - 13. recommended external circuits figure 72 shows recommended external connection . figure 72 . typical connection diagram note 27 . all digital input pins must not be allowed to float. msn pw2 pw1 pw0 pdn vdd18 dvss tvdd mclk test ain 4 p ain 4 n sd/pmod slow/dckb cks3/cad1 cks2/scl/cclk cks1/cad0_i2c/csn cks0/sda/cdti ovf sdto2/dsdor2 sdto1/dsdol2 tdmin/dsdor1 lrck/dsdol1 bick/dclk 1 nc vref l1 vrefh1 ain 2n ain 2p avdd avss ain 3p ain 3n vrefh 2 vrefl 2 nc dif0/ dsdsel0 dif1/dsdsel1 tdm0 tdm1 ps n /cad0_spi i2c dp hpfe /dcks ldoe odp ain1p ain1n 2 3 4 5 6 7 8 9 10 1 1 1 2 13 14 15 16 17 18 19 20 21 22 23 24 36 35 34 33 32 3 1 30 29 28 27 26 25 48 47 46 45 44 43 42 41 40 39 38 37 4.7 ? + 0.1 ? 10 ? 100 ? 0.1 ? 0.1 ? 10 ? + + digital 3.3v ain 2 ? ain 2+ ain 3 + ain 3 ? ain 4 + ain 4 ? ain1 ? ain1+ analog 5v analog 5v mode setting mode setting mode s etting controller controller master clock fs 64fs ak5554 top view 0.1 ? 100 ? + analog 5v 20 20 digital 3.3v + 0.1 ? [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 64 - 1. grounding and power supply decoupling the ak555 4 requires careful attention to power supply and grounding arrangements. normally avdd and tvdd are supplied from analog supply of the s ystem . the power - up sequence between avdd and tvdd are not critical when avdd and tvdd are supplied separately . dvss and avss must be connected to the same analog ground plane. system analog ground and digital ground should be wired separately and connecte d together as close as possible to where the supplies are brought onto the printed circuit board. decoupling capacitors for high frequency should be placed as near as possible to the supply pin. 2. reference voltage the differential voltage between the vrefh1 - 2 pin s and the vrefl1 - 2 pi n s are the common voltage of a/d conversion. the vrefl1 - 2 pin s are normally connected to avss . in order to remove a high frequency noise, connect a 20 resistor between the vrefh1 - 2 pins and analog 5 v supply, and connect a 0.1 f ceramic capacitor in parallel with an 100 f electrolytic capacitor between th e vrefh1 - 2 pin s and the v refl1 - 2 pin s . especially the ceramic capacitor should be connected as close as possible to the pin. all digital signals, especially clocks, sho uld be kept away from the vrefh 1 - 2 pins and vr efl1 - 2 pins in order to avoid unwanted noise couplin g into the ak555 4 . 3. analog input s the analog input signal is differentially suppl ied into the modulator via the a in n+ and the a in n - pins (n= 1 - 4 ) . the inp ut voltage is the difference between the a lin n+ and a lin n - pins (n= 1 - 4 ) . the full scale signal on each pin is nominally 2.8 v (typ). a v oltage from avss to avdd can be input to the ak555 4 . the output code format is twos complement. the internal hpf remo ves dc offset ( including dc offset by the adc itself ) . the ak555 4 requires a +5 v analog supply voltage. any voltage which exceeds the upper limit of avdd+0.3 v and lower limit of a vss ? 0.3 v and any current beyond 10 ma for the an alog input pins should b e avoided. excessive currents to the input pins may damage the device. hence input pins must be protected from signals at or beyond these limits. use caution especially when using 15 v for other analog circuits in the system. [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 65 - 4. external analog circuit examples figure 73 shows an input buffer circuit example 1. (1 st order hpf; fc= 0.70 hz, 2 nd order lpf; fc= 351 khz, gain= ? 14.5 db). the analog signal is able to input through xlr or bnc connectors. (short jp1 an d jp2 for bnc input, open jp1 and jp2 for xlr input). the input level of this circuit i s 1 4.9 vpp ( ak555 4 : 2.8 vpp typ.). when using this circuit, analog characteristics at fs= 48 khz is dr= 1 15 db, s/ (n+d)= 1 06 db. the s/(n+d) characteristics of the ak555 4 varies depending on dc bias current of the input signal. set the dc bias voltage in a range from 0.49 x avdd to 0.51 x avdd for a better characteristic. * film capacitors are recommended for the components shown as 15nf and 1 nf in the figure below . figure 73 . input buffer e xample1 fin 1hz 10hz frequency response ? ? ? 4.7k - + - + 1 0 3.3k 620 - + 10 620 analog in 1 4 . 9 vpp 68 njm5534 va=+5v vp= ? 15v 4.7k 10 + 1 0 k 10k 0.1 bias va + 2 .8 vpp 2 .8 vpp vp+ vp - bias 1n * 3.3k 1n * bias 15 n * 68 xlr vin - vin + jp1 jp2 njm5534 njm5534 ak 55 5 4 a in n + ak5 5 5 4 a in n - 100p 100p [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 66 - 14. package outline dimensions 48 - pin qfn (unit mm) material & lead finish package molding compound: epoxy resin lead frame material: cu terminal surface treatment: solder (pb free) plate marking 1) pin #1 indication 2) date code : xx x xxxx ( 7 digits) 3) market ing code : ak555 4 v n 4) akm logo akm ak555 4 v n xxxxxxx 1 c 0 . 6 0 m a x c b 0.08 c a 0.400.10 +0.07 -0.05 0 . 2 0 0 . 0 2 + 0 . 0 3 - 0 . 0 2 7.000.10 6.750.10 7 . 0 0 0 . 1 0 6 . 7 5 0 . 1 0 5.1 5 . 1 0 . 8 5 + 0 . 1 5 - 0 . 0 5 0.50 0.23 m 0.10 ab [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 67 - 15. ordering guide ak555 4 v n ? 40 - 105 o c 48 - pin qfn akd55 5 4 evalua tion board for ak555 4 16. revision history date (y/m/d) revision reason page contents 1 6 / 03 / 1 0 00 first edition [ ak555 4 ] 015099864 - e - 00 201 6/0 3 - 68 - important notice 0. asahi kasei microdevices corporation (akm) reserves the right to make changes to the information contained in this document without notice. when you consider any use or application of akm product stipulated in this document ( product ) , please make inquiries the sales office of akm or authorized distributor s as to current status of the products. 1. a ll information included in this document are provided only to illustrate the operation and application examples of akm products . akm neither makes warranties or representations with respect to the accuracy or completeness of the information contained in th is document nor grants any license to any intellectual property rights or any other rights of akm or any third party with respect to the information in this document. you are fully responsible for use of such information contained in this document in your product design or applications . akm assumes no liability for any losses incurred by you or third parties arising from the use of such information in your product design or applications. 2. the product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public impact , including but not limited to, equipme nt used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety dev ices, elevators and escalators, devices related to electric power, and equipment used in finance - related fields. do not use product for the above use unless specifically agreed by akm in writing . 3. though akm works continually to improve the products qua lity and reliability, you are responsible for complying with safety standards and for providing adequate designs and safeguards for your hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of the produc t could cause loss of human life, bodily injury or damage to property, including data loss or corruption. 4. do not use or otherwise make available the product or related technology or any information contained in this document for any military purposes, i ncluding without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). when exporting the p roducts or related technology or any info rmation contained in this document, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. the p roducts and related technology may not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations. 5. please contact akm sales representative for details as to environmental matters such as the rohs compatibility of the product . please use the product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the eu rohs directive. akm assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 6. resale of the product with provisions different from the statement and/or technical features set forth in this document shall immediately void any warranty granted by akm for the product and shall not create or extend in any manner whatsoever , any liability of akm. 7. this document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of akm . |
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