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[ak5374] ms1197-e-00 2010/06 - 1 - general description the ak5374 is a stereo a/d converte r with a usb 2.0 interface. t he device includes an integrated usb serial interface engine, a usb transceiver, an audio class processing block, endpoints, and a 24-bit stereo audio adc. an integrated p ll enables the use of multiple sampling frequencies. a microphone amplifier and an integrated programm able gain amplifier are available for processing low-level signals from an analog microphone element. an external eep-rom is used to store the descriptor information. the ak5374 is housed in a 36-pin pa ckage. it is a low power devic e, operating from +3.3v, and consuming just 100mw in active mode and less than 100 a in suspend mode. features ? usb 2.0 compliant (full speed audio class) ? usb audio controller usb serial interface engine audio class encoder/decoder ? usb synchronization synchronous type (synchronize with 1ms sof) ? 24-bit stereo a/d converter with mute control s/(n+d) = 85db, s/n = 91db (avdd=3.3v, mic-amp = 0db) s/(n+d) = 70db, s/n = 78db (avdd=3.3v, mic-amp = +30db) ? microphone amplifier gain: 0db, +6db, +12db, +18db, +24db, +30db, +36db ? digital programmable gain: +24db ~ -31db, 1db step ? integrated pll supports st andard sampling frequencies 8khz, 11.025khz, 16khz, 22.05khz, 32khz 44.1khz, 48khz ? eep-rom interface for descriptors ? power management ? low power consumption 30ma in active mode less than 100 a in suspend mode ? power supply: analog power supply (avdd): 3.0 ~ 3.6v digital power supply (dvdd): 3.0 ~ 3.6v ? ta = -10 ~ +70 c ? package: 36pin qfn (5 x 5 mm, 0.4mm pitch) 24-bit stereo adc with usb interface ak5374
[ak5374] ms1197-e-00 2010/06 - 2 - block diagram mpwr miclp micrp vref xto xti usb sie usb tx/rx ckm = ?h? audio stream control control decode rstn susn clkdrv vref vcom micln micrn gain: 0/+6/+12/+18/+24/+30/+36db avdd dvdd vss2 vss1 vss3 pmadl pmadr clko pmmp eep-rom spi i/f int mic ext mic pll (system/audio) dvol mute lmuten rmuten 24bit adc pmadl or pmadr csn sk epao epai xte = ?h? dp dn dvdd 18 ? 18 ? 1.5k ? 24mhz figure 1. block diagram
[ak5374] ms1197-e-00 2010/06 - 3 - ordering guide AK5374EN ? 10 +70 c 36pin qfn (0.4mm pitch) akd5374 evaluation board for ak5374 pin layout atio vref vcom mpwr avdd vss3 mic rn micrp nc c km xto xti xte clkdrv dn micln mic lp lmuten rmute n nc testm0 susn rstn vss2 dvdd testm2 csn sk epao epai vss1 a k5374en top view 28 29 30 3 1 3 2 33 34 35 27 26 25 17 16 1 5 14 13 12 11 10 24 23 22 21 20 1 2 3 4 5 6 7 8 36 19 18 nc 9 testm3 dp nc testm1
[ak5374] ms1197-e-00 2010/06 - 4 - pin/function no. pin name i/o function reset state (rstn pin = ?l?) 1 micln i left channel inverting input pin 2 miclp i left channel positive input pin 3 lmuten i left channel mute pin ?l?: mute ?h?: normal operation 4 rmuten i right channel mute pin ?l?: mute ?h?: normal operation 5 nc - no connect pin no internal bonding. normal ly connected to vss1-3. 6 testm0 i test #0 pin this pin must be connected to vss1-3. 7 susn o suspend status output pin ?l?: suspend state ?h?: normal operation ?l? output 8 rstn i reset pin when ?l?, the ak5374 is held in reset. the ak5374 must be always reset upon power-up. 9 nc - no connect pin no internal bonding. normal ly connected to vss1-3. 10 testm1 i test #1 pin this pin must be connected to vss1-3. 11 vss1 - ground pin 12 epai i eep-rom serial data input pin 13 epao o eep-rom serial data output pin ?hi-z? 14 sk o eep-rom serial clock output pin ?hi-z? 15 csn o eep-rom chip select output pin ?hi-z? 16 testm2 i test #2 pin this pin must be connected to vss2. 17 dvdd - digital power supply pin, 3.0 ~ 3.6v 18 vss2 - ground pin 19 dn i/o usb bus inverting pin input 20 dp i/o usb bus positive pin this pin must be connected to dvdd with 1.5k ? resistor. input 21 nc - no connect pin no internal bonding. normal ly connected to vss1-3. 22 testm3 i test #3 pin this pin must be connected to vss1-3. 23 clkdrv o clock drive output pin ?l? output 24 xte i crystal oscillator enable pin ?l?: master clock input mode ?h?: crystal oscillator mode mcki i master clock input pin (xte pin = ?l?) 25 xti i crystal oscillator input pin (xte pin = ?h?) 26 xto o crystal oscillator output pin ?l? output 27 ckm i crystal mode select pin ?l?: 16mhz ?h?: 24mhz
[ak5374] ms1197-e-00 2010/06 - 5 - no. pin name i/o function reset state (rstn pin = ?l?) 28 atio i/o test pin this pin must be connected to vss1-3. ?input? 29 vref o high level voltage reference output pin ?l? output 30 vcom o analog common voltage output pin ?l? output 31 mpwr o microphone power supply pin ?hi-z? 32 avdd - analog power supply pin, 3.0 ~ 3.6v 33 vss3 - ground pin 34 micrn i right channel inverting input pin 35 micrp i right channel positive input pin 36 nc - no connect pin no internal bonding. normal ly connected to vss1-3. note 1. all digital input pins (epai, ckm, lmuten, rmuten, xte and testm0/1/2/3 pins) must not be left floating.
[ak5374] ms1197-e-00 2010/06 - 6 - handling of unused pin unused i/o pins must be processed appropriately as below. classification pin name setting miclp, micln miclp pin is connected to micln pin. micrp, micrn micrp pin is connected to micrn pin. analog input atio this pin must be connected to vss1-3. analog output mpwr this pin must be open. ckm, xte, testm0/1/2/3 these pins must be connected to vss1-3. digital input lmuten, rmuten these pins must be connected to dvdd. digital output susn, clkdrv these pins must be open. absolute maximum ratings (vss1=vss2=vss3=0v; note 2 ) parameter symbol min max units power supplies: analog digital avdd dvdd -0.3 -0.3 4.6 4.6 v v input current, any pin except supplies iin - 10 ma analog input voltage ( note 3 ) vina -0.3 avdd+0.3 v digital input voltage ( note 4 ) vind -0.3 dvdd+0.3 v ambient temperature (power applied) ta -10 70 c storage temperature tstg -65 150 c note 2. all voltages with respect to ground. note 3. miclp, micln, micrp and micrn pins. note 4. ckm, lmuten, rmuten, epai, xte and testm0/1/2/3 pins. warning: operation at or beyond these limits may result in permanent damage to the device. normal operation is not guaranteed at these extremes. recommended operating conditions (vss1=vss2=vss3=0v; note 2 ) parameter symbol min typ max units power supplies ( note 5 ) analog digital difference avdd dvdd avdd-dvdd 3.0 3.0 -0.3 3.3 3.3 0 3.6 3.6 +0.3 v v v note 2. all voltages with respect to ground. note 5: the power up sequence am ong avdd and dvdd is not critical. warning: akm assumes no responsibility for the usage beyond the conditions in this datasheet.
[ak5374] ms1197-e-00 2010/06 - 7 - analog characteristics (ta=25 c; avdd=dvdd=3.3v; vss1=vss2=vss3=0v; signal frequency = 1khz; sampling frequency = 48khz; bw = 20hz to 20khz, unless otherwise specified) parameter min typ max units microphone amplifier: miclp/micln/micrp/micrn pins input resistance 10 20 - k mgain0-2 bits = ?001? -1 0 +1 db mgain0-2 bits = ?010? +5 +6 +7 db mgain0-2 bits = ?011? +11 +12 +13 db mgain0-2 bits = ?100? +17 +18 +19 db mgain0-2 bits = ?101? +23 +24 +25 db mgain0-2 bits = ?110? +29 +30 +31 db gain mgain0-2 bits = ?111? +35 +36 +37 db microphone power supply: mpwr pin output voltage 1.9 2.2 2.5 v output current - - 2.0 ma adc analog input characteristics: miclp/micln/micrp/micrn pins resolution - - 24 bits ( note 6 ) 1.00 1.20 1.40 vpp input voltage ( note 7 ) - 0.038 - vpp ( note 6 ) 75 85 - db s/(n+d) (-1dbfs) ( note 7 ) - 70 - db ( note 6 ) 81 91 - db dynamic range ( ? 60dbfs, a-weighted) ( note 7 ) - 78 - db ( note 6 ) 81 91 - db s/n (a-weighted) ( note 7 ) - 78 - db power supplies: power supply current normal operation (internal adc mode) avdd dvdd - - 10 20 15 30 ma ma power down rstn pin = ?l? ( note 8 ) suspend mode - - 10 10 100 100 a a note 6. mgain2-0 bits = ?001? (0db) note 7. mgain2-0 bits = ?110? (+30db) note 8. all digital input pins are fixed to dvdd or vss2.
[ ak5374] ms1197-e-00 2010/05 - 8 - filter characteristics (ta=-10 ~ +70 c; avdd=dvdd=3.0 ~ 3.6v; fs=48khz) parameter symbol min typ max units adc digital filter passband ( note 9 ) -0.07 ~ +0.15db pb 0 - 18.9 khz -0.2db - 20.3 - khz -3.0db - 22.9 - khz -6.0db - 23.9 - khz stopband sb 28.0 - - khz passband ripple pr -0.07 - +0.15 db stopband attenuation sa - 68.0 - db group delay gd - 14 - 1/fs group delay distortion gd - 0 - s adc digital filter (hpf): frequency response ( note 9 ) -3.0db -0.1db fr - - 0.93 6.1 - - hz hz note 9. the passband and stopband frequencies scale with fs (system sampling rate). each response refers to that of 1khz dc characteristics (ta=-10 ~ +70 c; avdd=dvdd=3.0 3.6v) parameter symbol min typ max units high-level input voltage ( note 11 ) vih 70%dvdd - - v low-level input voltage ( note 11 ) vil - - 30%dvdd v high-level output voltage ( note 12 , iout= ? 200 a) voh dvdd ? 0.2 - - v low-level output voltage ( note 12 , iout=200 a) vol - - 0.2 v input leakage current ( note 13 ) iin - - 10 a note 10. all digital pins except for dp, dn pins. schmitt hysteresis level of rstn pin and levels of all test pins are not tested. note 11. epai, ckm, lmuten, rmuten , rstn, xte and testm0/1/2/3 pins. note 12. csn, sk, epao, susn and clkdrv pins. note 13. expect for epai pin. epai pin has internal pull-down device, nominally 100k ? .
[ ak5374] ms1197-e-00 2010/05 - 9 - switching characteristics (ta=25 c; avdd=dvdd=3.3v; cl=50pf) parameter symbol min typ max units master clock frequency crystal resonator ckm pin = ?l? fxtal1 - 16 - mhz ckm pin = ?h? fxtal2 - 24 - mhz usb interface dp, dn single ended receiver threshold (high-level) (low-level) vseh vsel 2.0 - - - - 0.8 v v time width for usb reset signal recognition (dp vsel & dn < vsel to suspend mode) tsus_rec 3.0 - - ms resume time from suspend ( note 14 ) (first flip of dp/dn from idle sate to device ready) tresm - - 30 ms usb transmitter data rate dr 11.97 12 12.03 mhz output impedance (hi) ( note 15 ) (dp, dn pins = ?h?, iout = -10ma) roh - 36 - output impedance (lo) ( note 15 ) (dp, dn pins = ?l?, iout = 10ma) rol - 36 - ?h? level output voltage (iout = -200a) vohd 2.8 - - v ?l? level output voltage (iout = 2.2ma) vold - - 0.3 v tri-state leakage current (0 < dp, dn < 3.3v) iolk -10 - 10 a rise/fall time trf/tff 4 12 20 ns rise/fall time matching trfm - 100 - % crossover point vcrs - 1.65 - v usb receiver common mode range cmr 0.8 - 2.5 v differential input sensitivity dis 200 - - mv schmitt high level voltage vihs 2.0 - - v schmitt low level voltage vils - - 0.8 v note 14. vref, x?tal oscillator, and pll get stable and bus transaction with normal rate is ready. note 15. including an external 18 ? (1%) resistor in series. parameter symbol min typ max units spi (eep-rom) contro l interface timing sk frequency fsk - 1.5 - mhz sk duty cycle dsk - 50 - % epai delay tcd - - 100 ns csn edge to sk ? ? tcss 300 - - ns sk ? ? to csn edge tcsh 300 - - ns csn ?h? time tcsw 300 - - ns epai setup time tcds 100 - - ns epai hold time tcdh 100 - - ns one shot mute timing one shot mute input width wosm 10 - - s reset timing reset input width ( note 16 ) wrst 1.0 - - s note 16. the ak5374 can be reset by the rstn pin = ?l?.
[ ak5374] ms1197-e-00 2010/05 - 10 - timing diagrams reset mode pl l clock dn dp dvdd device connected rstn tdrr min 20ms resume min 10 ms re sume time re sume recove ry tim e tr s t_r ec figure 2. mode change with respect to bus states 1 (power on and device connected) pll clock d- d+ dvdd ?h? tr es m tsus_rec rstn ?h? figure 3. mode change with respect to bus states 2 (bus transactions) 10% dvdd 90% dvdd t rs t rf dp, dn t fs t ff figure 4. rise/fall time vcrs dp, dn figure 5. crossover point vils vihs dp, dn figure 6. schmitt level voltage vil rstn wrst figure 7. power-down & reset timing
[ ak5374] ms1197-e-00 2010/05 - 11 - vil lmuten rmuten wosm figure 8. one shot mute timing csn tcss sk tcd epao tskh tskl 1 / fsk epai hi-z dsk = tskl x fsk x 100 tskh x fsk x 100 50%dvdd tcsh tcsw 50%dvdd d7 d0 hi-z 50%dvdd tcdh tcds 70%dvdd 30%dvdd figure 9. spi (eep-rom) control interface timing
[ ak5374] ms1197-e-00 2010/05 - 12 - operation overview overview of ak5374 the ak5374 is a stereo a/d co nverter with usb interface. it is easy to us e since the control logic including usb audio class, stereo differential microphone amplifiers, two pll? s usb serial interface engine, and fifo are integrated. all descriptor contents are stored in eep-rom and customizable. for example, when supporting a mono microphone by 48khz sampling rate only, what needed to be done is to pr epare appropriate usb descriptor . there is no need for writing program codes. the ak5374 integrates the following blocks: 1. 24bit high performance stereo a/d converter a) s/n: 91db (mic gain=0db), s/n: 78db (mic gain=+30db) 2. mic power supply a) output voltage: 2.2v (typ) 3. differential microphone amplifier a) setting of gain: 0db, +6db, +12db, +18db, +24db, +30db, +36db 4. digital programmable gain a) gain range: from +24db to -31db (setting of gain: max, min and initial value) b) gain step: 1db/step (fix) 5. pll a) 16.0mhz or 24.0mhz crystal generator with output buffer (available for external clock input) b) two plls - a/d_pll: generate audio clock - system_pll: generate usb system clock 6. audio synchronization type a) synchronous type - isochronous transfer uses synchronous type synchronization which is synchronous to sof (start of frame) packets which are issued per 1ms. 7. usb audio format a) supports 7 frequencies: 8khz, 11.025khz, 16khz, 22.05khz, 32khz, 44.1khz, 48khz b) stereo/mono 24bit/16bit/8bit lsb first 8. fifo a) synchronization between a/d converter and usb bus - memory size 576 bytes: 24bit (3 bytes) x 48 samples x 2 channel x 2 frames 9. usb serial interface engine a) process usb standard requests 10. control block of audio device class a) translate internal a/d format to usb audio class format b) process usb audio class request - mute - gain/attenuation - sampling frequency control 11. usb transceiver 12. eep-rom i/f spi ? (4-wire) type eep-rom can be used to customize all usb descriptors and any functions. - 8k bits (ak6506c) or larger 13. usb suspend/resume support 14. stand-alone mute a) zero crossing detection mute or one shot mute (not support hid function)
[ ak5374] ms1197-e-00 2010/05 - 13 - clock source 16mhz or 24 mhz crystal resonator can be used as the mast er clock. when the ckm pin is set to ?h?, the ak5374 supports 24mhz, and supports 16mhz when the ckm pin is set to ?l?. the ak5374 can drive the clock up to three external loads. the ak5374 generates 48mhz for system clock from 16mhz or 24mhz by system pll circuit. ckm pin x?tal frequency l 16.0mhz h 24.0mhz table 1. reference x?tal frequency the clock for the mcki/xti pin can be generated by the following methods: 1) x?tal (xte pin = ?h?) mcki/xti xto ak5374 clkdrv clko bit note 17. external capacitance depends on the crystal oscillator (max. 30pf) figure 10. x?tal mode 2) external clock (xte pin = ?l?) mcki/xti xto external clock ak5374 clkdrv clko bit note 18. input clock must not exceed dvdd. figure 11. external clock mode
[ ak5374] ms1197-e-00 2010/05 - 14 - mic gain amplifier the ak5374 has a gain amplifier for microphone inputs. th e gain of mic-amp is selected by the mgain2-0 bits ( table 2 ). mgain2 bit mgain1 bit mgain0 bit input gain 0 0 0 0db 0 0 1 0db 0 1 0 +6db 0 1 1 +12db 1 0 0 +18db 1 0 1 +24db 1 1 0 +30db 1 1 1 +36db table 2. mic input gain (x: don?t care) mic power when pmmp bit = ?1?, the mpwr pin supplies power for the microphone. this output voltage is typically 2.2v and the output current is maximum 2.0ma. in case of using two sets of stereo full-differential microphones, the load resistance is minimum 1k for each channel. any capacitor must not be connected directly to the mpwr pin ( figure 12 ). pmmp bit mpwr pin 0 hi-z 1 output table 3. mic power mpwr 1k mic power microphone miclp micln microphone 1k vref 1k micrp micrn 1k ak5374 figure 12. mic block circuit
[ ak5374] ms1197-e-00 2010/05 - 15 - digital high pass filter the adc has a digital high pass filter for dc offset cance llation. the cut-off frequency of the hpf is 0.93hz at fs=48khz. the digital high pass filter cut-off frequency scales with the sampling rate (fs). the hpf is always enabled. audio data format the ak5374 supports 8bit, 16bit and 24bit audio data format and outputs lsb first to usb bus. 1) 8bit mono data format on the usb sample # #1 #2 #3 mono mono mono 8 bit 8bit 8 bit bit position 0-7 0-7 0-7 table 4. audio data format for 8bit mono 2) 16bit stereo data format on the usb sample # #1 #2 l-ch data r-ch data l-ch data r-ch data lower 8 bit upper 8 bit lower 8 bit upper 8 bit lower 8 bit upper 8 bit lower 8bit upper 8 bit bit position 0-7 8-15 0-7 8-15 0-7 8-15 0-7 8-15 table 5. audio data format for 16bit stereo 3) 24bit stereo data format on the usb sample # #1 #2 l-ch data r-ch data l-ch data r-ch data lower 8 bit middle 8 bit upper 8 bit lower 8 bit middle 8 bit upper 8 bit lower 8 bit middle 8 bit upper 8 bit lower 8 bit middle 8 bit upper 8 bit bit position 0-7 8-15 16-23 0-7 8-15 16-23 0-7 8-15 16-23 0-7 8-15 16-23 table 6. audio data format for 24bit stereo
[ ak5374] ms1197-e-00 2010/05 - 16 - volume & mute control the ak5374 has a digital volume control which ranges from +24db to -31db in 1db step. the maximum volume, the minimum and default volumes are defined by eep-rom header setting. when zce bit = ?1? (zero cross detection enable), l-channe l and r-channel volumes are changed independently on zero cross or zero cross timeout. zero cross timeout is set by ztm1-0 bits ( table 7 ). when zce bit = ?0? (zero cross detection disable), the volume is changed immedi ately. mute operation and zero cross de tection have the same relation as the volume mentioned in this section. zero crossing timeout period ztm1 bit ztm0 bit 8khz 16khz 44.1khz 0 0 128/fs 16ms 8ms 2.9ms 0 1 256/fs 32ms 16ms 5.8ms 1 0 512/fs 64ms 32ms 11.6ms 1 1 1024/fs 128ms 64ms 23.2ms table 7. zero crossing timeout period the ak3573 has the lmuten and rmuten pins. and they can control mute operations from the device side. however, because the ak5374 does not have hid f unction, the mute operation by these pins cannot be acknowledged by the host. there are two modes for the mute operation by lmuten and rmuten pins; one is normal mute and the other is one-shot mute. in normal mute operation (osme bit = ?0?), mute is executed on zero cross or zero cross timeout when the lmuten and rmuten pins = ?l? if zero cross detection is enabled. when zero cross detection is disabled , it is executed immediately. in case that the lmuten and rmuten pins = ?h?, mute is rel eased on zero cross or zero cr oss timeout if the zero cross detection is enabled. when zero cross detection is disabled, it is released immediately. lmuten pin rmuten pin ad data volume (zce bit = ?1?) - set value zero cross volume (zce bit = ?0?) - set value figure 13. normal mute for lmuten, rmuten pins
[ ak5374] ms1197-e-00 2010/05 - 17 - in one-shot mute operation (osme bit = ?1?), mute is execute d on zero cross or zero cross timeout after detecting a falling edge of the lmuten and rmuten pins. the ak5374 releases the mute on zero cross or zero cross timeout after mute hold period which is set by mhld7-0 bits. lmuten pin rmuten pin ad data mute hold 1~255/fs (mhld7-0 bits) volume - set value zero cross figure 14. one shot mute for lmuten, rmuten pins
[ ak5374] ms1197-e-00 2010/05 - 18 - power management control usb specifies that the current at suspend mode must not exceed 500 a. when the usb host is in suspend mode, the susn pin also becomes to ?l? in order to notify this mode to the external components like dsp?s to observe usb specification. synchronization the ak5374 supports synchronous type synchronization which is synchronous to sof (start of frame) packets which are issued per 1ms. descriptor?s customization usb audio class has very flexible, but complicated format. in order to keep both of the flexibility and simplicity to use, the ak5374 utilizes the precompiled control information in eep -rom instead of direct usb audio class decoding. data in eep-rom is divided into two blocks; header information block and usb descriptor block. header block size is fixed while usb descriptor block size is variable. header information includes various control information such as audio format, the microphone?s gain, power management information, and etc. when the device is powered up, at first the ak5374 reads the header block in eep-rom, and maps these values into the internal registers. note that 8k bits or larger spi type eep-rom is available. the ak5374 does not store all of the descriptors into intern al memory at the boot time. instead, the ak5374 reads the descriptor from eep-rom and transmit it when it recei ves the ?get descriptor? request command. the ak5374 transmits nak until it is ready to send data. header information includes 1) power management information 2) microphone gain 3) mute control information 4) descriptor related information a) pcm format(stereo/mono, resolution) and the related alternate setting number b) endpoint number c) initial/minimum/maximum volume
[ak5374] ms1197-e-00 2010/05 - 19 - eep-rom control interface register information and descriptor information on eep-rom are read by spi i/f (csn, sk, epao and epai) pins. the data on the i/f consists of instruction byte, address byte (msb first, 16bits) and input data byte (msb first, 8bits). the ak5374 outputs instruction byte and address byte on a falling edge of sk and down-loads address data from epai. the next address data is read by sending sk signal continuously. data reading ends by a rising edge of csn. sk clock speed is typically 1.5mhz. the ak5374 reads data from eep-rom according to a request signa l from the usb host after releasing a reset. csn sk 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 epao 0 0 0 0 1 1 0 a9 a8 0 0 0 0 0 0 0 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 a6 a4 a2 a0 d7 d5 d3 d1 d7 d5 d3 d1 d8 a7 a5 a3 a1 instruction address (n) ?h? or ?l? d6 d4 d2 d0 d 6 data (n) d4 d2 d0 data (n+1) epai d7 d1 d0 36 37 38 39 40 41 42 figure 15. eep-rom i/f read sequence eep-rom memory map

32 bytes (fixed) addr name d7 d6 d5 d4 d3 d2 d1 d0 000h power management 0 0 0 self 0 clko pmadr pmadl 001h microphone gain control 0 0 0 pmmp 0 mgain2 mgain1 mgain0 002h reserved 0 0 0 0 0 0 0 0 003h pcm format alt 1 intfq12 intfq11 intfq10 mix1 res11 res10 signed1 stereo1 004h pcm format alt 2 intfq22 intfq21 intfq20 mix2 res21 res20 signed2 stereo2 005h pcm format alt 3 intfq32 intfq31 intfq30 mix3 res31 res30 signed3 stereo3 006h pcm format alt 4 intfq42 intfq41 intfq40 mix4 res41 res40 signed4 stereo4 007h pcm format alt 5 intfq52 intfq51 intfq50 mix5 res51 res50 signed5 stereo5 008h pcm format alt 6 intfq62 intfq61 intfq60 mix6 res61 res60 signed6 stereo6 009h pcm format alt 7 intfq72 intfq71 intfq70 mix7 res71 res70 signed7 stereo7 00ah sampling frequency alt 1 valid1 fs48k1 fs44k1 fs32k1 fs22k1 fs16k1 fs11k1 fs8k1 00bh sampling frequency alt 2 valid2 fs48k2 fs44k2 fs32k2 fs22k2 fs16k2 fs11k2 fs8k2 00ch sampling frequency alt 3 valid3 fs48k3 fs44k3 fs32k3 fs22k3 fs16k3 fs11k3 fs8k3 00dh sampling frequency alt 4 valid4 fs48k4 fs44k4 fs32k4 fs22k4 fs16k4 fs11k4 fs8k4 00eh sampling frequency alt 5 valid5 fs48k5 fs44k5 fs32k5 fs22k5 fs16k5 fs11k5 fs8k5 00fh sampling frequency alt 6 valid6 fs48k6 fs44k6 fs32k6 fs22k6 fs16k6 fs11k6 fs8k6 010h sampling frequency alt 7 valid7 fs48k7 fs44k7 fs32k7 fs22k7 fs16k7 fs11k7 fs8k7 011h endpoint number 0 0 0 0 0 epno2 epno1 epno0 012h initial volume intvol7 intvol6 intvol5 intvol4 intvol3 intvol2 intvol1 intvol0 013h minimum volume minvol7 minvol6 minvol5 minvol4 minvol3 minvol2 minvol1 minvol0 014h maximum volume maxvol7 maxvol6 maxvol5 maxvol4 maxvol3 maxvol2 maxvol1 maxvol0 015h mute control 1 0 0 0 0 osme zce ztm1 ztm0 016h mute control 2 mht7 mht6 mht5 mht4 mht3 mht2 mht1 mht0 017h reserved 0 0 0 0 0 0 0 0 018h reserved 0 0 0 0 0 0 0 0 019h reserved 0 0 0 0 0 0 0 0 01ah reserved 0 0 0 0 0 0 0 0 01bh reserved 0 0 0 0 0 0 0 0 01ch reserved 0 0 0 0 0 0 0 0 01dh reserved 0 0 0 0 0 0 0 0 01eh reserved 0 0 0 0 0 0 0 0 01fh reserved 0 0 0 0 0 0 0 0
[ak5374] ms1197-e-00 2010/05 - 20 - addr descriptor size 020h ~ 023h language id string descriptor 4 bytes 024h ~ 0a3h imanufacturer string descriptor 128 bytes (max) 0a4h ~ 123h iproduct string descriptor 128 bytes (max) 124h ~ 1a3h iserial number st ring descriptor 128 bytes (max) 1a4h ~ 1b5h device descriptor 18 bytes 1b6h ~ 1beh configuration descriptor 9 bytes 1bfh ~ 1c7h standard audio cont rol interface descriptor 9 bytes 1c8h ~ 1d0h class-specific audio c ontrol interface de scriptor 9 bytes 1d1h ~ 1dch input terminal descriptor 12 bytes 1ddh ~ 1e5h output termin al descriptor 9 bytes 1e6h ~ feature unit descriptor 8 or 10 bytes zero-bandwidth alternate setting 0 standard as interface descriptor 9 bytes alternate setting 1 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 2 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 3 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 4 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 5 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 6 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes alternate setting 7 standard as interface descriptor class-specific as genera l interface descriptor type 1 format type descriptor standard endpoint descriptor class-specific isochronous audi o data endpoint descriptor 9 bytes 6 bytes 11 ~ 29 bytes 9 bytes 7 bytes note 19. read address after a reset release: 000h~016h, 024h, 0a4h, 124h, 1b8h~1b9h (total 28bytes) note 20. the data address must be written slide forward if the number of bytes is less than the data size above in the address after 1e6h. note 21. the setting of 003h~011h and the setting after 1f9h must be matched.
[ak5374] ms1197-e-00 2010/05 - 21 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 00h power management 0 0 0 self 0 clko pmadr pmadl pmadl: mic-amp lch and adc lch power management ?0?: power-up ?1?: power-down pmadr: mic-amp rch and adc rch power management ?0?: power-up ?1?: power-down clko: master clock output driver power management ?0?: power-up ?1?: power-down self: self power mode enable ?0?: bus power mode ?1?: self power mode addr register name d7 d6 d5 d4 d3 d2 d1 d0 01h microphone gain control 0 0 0 pmmp 0 mgain2 mgain1 mgain0 mgain2-0: mic-amp gain control ?000?: 0db ?001?: 0db ?010?: +6db ?011?: +12db ?100?: +18db ?101?: +24db ?110?: +30db ?111?: +36db pmmp: mpwr pin power management ?0?: power-up ?1?: power-down: hi-z
[ak5374] ms1197-e-00 2010/05 - 22 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 03h pcm format alt 1 intfq12 intf q11 intfq10 mix1 res11 res10 signed1 stereo1 04h pcm format alt 2 intfq22 intf q21 intfq20 mix2 res21 res20 signed2 stereo2 05h pcm format alt 3 intfq32 intf q31 intfq30 mix3 res31 res30 signed3 stereo3 06h pcm format alt 4 intfq42 intf q41 intfq40 mix4 res41 res40 signed4 stereo4 07h pcm format alt 5 intfq52 intf q51 intfq50 mix5 res51 res50 signed5 stereo5 08h pcm format alt 6 intfq62 intf q61 intfq60 mix6 res61 res60 signed6 stereo6 09h pcm format alt 7 intfq72 intf q71 intfq70 mix7 res71 res70 signed7 stereo7 stereo: mono/stereo mode select ?0?: mono ?1?: stereo signed: unsigned/signed mode select ?0?: unsigned (?0? is valid only when the resolution is 8 bit) ?1?: signed res1-0: adc resolution mode select ?00?: 8bit ?01?: 16bit ?10?: 24bit mix: adc data mix control ?0?: lch and rch are not mixed. ?1?: lch and rch are mixed. dynamic range and s/n can be improved by approximately 3db when the same analog signal is inputted to left and right channels. intfq2-0: initial sampling frequency ?000?: 8khz, ?001?: 11.025khz ?010?: 16khz, ?011?: 22.05khz ?100?: 32khz, ?101?: 44.1khz ?110?: 48khz
[ak5374] ms1197-e-00 2010/05 - 23 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 0ah sampling frequency alt 1 valid1 fs48k 1 fs44k1 fs32k1 fs22k1 fs16k1 fs11k1 fs8k1 0bh sampling frequency alt 2 valid2 fs48k 2 fs44k2 fs32k2 fs22k2 fs16k2 fs11k2 fs8k2 0ch sampling frequency alt 3 valid3 fs48k 3 fs44k3 fs32k3 fs22k3 fs16k3 fs11k3 fs8k3 0dh sampling frequency alt 4 valid4 fs48k 4 fs44k4 fs32k4 fs22k4 fs16k4 fs11k4 fs8k4 0eh sampling frequency alt 5 valid5 fs48k 5 fs44k5 fs32k5 fs22k5 fs16k5 fs11k5 fs8k5 0fh sampling frequency alt 6 valid6 fs48k 6 fs44k6 fs32k6 fs22k6 fs16k6 fs11k6 fs8k6 10h sampling frequency alt 7 valid7 fs48k 7 fs44k7 fs32k7 fs22k7 fs16k7 fs11k7 fs8k7 fs8k: sampling frequency 8khz enable ?0?: disable ?1?: enable fs11k: sampling frequency 11.025khz enable ?0?: disable ?1?: enable fs16k: sampling frequency 16khz enable ?0?: disable ?1?: enable fs22k: sampling frequency 22.05khz enable ?0?: disable ?1?: enable fs32k: sampling frequency 32khz enable ?0?: disable ?1?: enable fs44k: sampling frequency 44.1khz enable ?0?: disable ?1?: enable fs48k: sampling frequency 48khz enable ?0?: disable ?1?: enable valid: alternate setting enable ?0?: disable ?1?: enable addr register name d7 d6 d5 d4 d3 d2 d1 d0 11h endpoint number 0 0 0 0 0 epno2 epno1 epno0 epno2-0: endpoint number (1~7)
[ak5374] ms1197-e-00 2010/05 - 24 - addr register name d7 d6 d5 d4 d3 d2 d1 d0 12h initial volume intvol7 intvol6 intvol5 intvol4 intvol3 intvol2 intvol1 intvol0 13h minimum volume minvol7 minvol6 minvol5 minvol4 minvol3 minvol2 minvol1 minvol0 14h maximum volume maxvol7 maxvol6 maxvol5 maxvol4 maxvol3 maxvol2 maxvol1 maxvol 0 intvol7-0: the value which the ak5374 returns when the host requests the current volume at first time. ( table 8 ) minvol7-0: the value which the ak5374 returns when the host requests the maximum volume. ( table 8 ) maxvol7-0: the value which the ak5374 returns when the host requests the minimum volume. ( table 8 ) addr register name d7 d6 d5 d4 d3 d2 d1 d0 15h mute control 1 0 0 0 0 osme zce ztm1 ztm0 16h mute control 2 mht7 mht6 mht5 mht4 mht3 mht2 mht1 mht0 ztm1-0: zero-crossing timeout period select ?00?: 128/fs ?01?: 256/fs ?10?: 512/fs ?11?: 1024/fs zce: adc digital volume zero-crossing enable ?0?: digital volume chan ges occur immediately. ?1?: digital volume changes occur only on zero-crossing or after timeout. osme: one shot mute enable for lmuten, rmuten pins ?0?: disable ?1?: enable mht7-0: one shot mute hold time 00h: n/a 01h: 1/fs ffh: 255/fs
[ak5374] ms1197-e-00 2010/05 - 25 - descriptor overview audiostreaming interface audiocontrol interface audio function it ot usb in endpoint microphone id1 id2 figure 16. ak5374 topology audiostreaming i/f alt. setting 0 audiostreaming i/f alt. setting 1~7 device configuration audiocontrol i/f class-specific ac i/f input terminal output terminal feature unit interface 0 interface 1 class-specific as general i/f type 1 format type endpoint class-specific isochronous audio data endpoint standard descriptors class-specific descriptors figure 17. descriptor hierarchy
[ak5374] ms1197-e-00 2010/05 - 26 - descriptors specification (for example) customizable block all descriptor contents are stored in eep-ro m and customizable with some restrictions. a) device descriptor, string descriptor - maximum packet size - idvendor - idproduct - manufacturer name (max. 126bytes) - product name (max. 126bytes) - serial number (max. 126bytes) - language id b) configuration descriptor - power consumption c) feature unit descriptor: or < bypass> - if feature unit is not defined in the descriptor, the volume is fixed to the initial value which is described in the eep-rom header block d) pcm format (note that the ak5374 supports 7 sample ra tes even when only 1 sample rate is specified in the descriptor.) e) endpoint number f) maximum value of digital gain g) minimum value of digital gain h) initial value of digital gain uncustomizable block a) configuration number (1) b) interface number (1) c) input terminal id (1) d) output terminal id (2) e) feature unit id (3) f) synchronization way (support synchronous type) g) maximum alternate setting number (7) h) endpoint number (1-7) 1. device descriptor offset field size value description 0 blength 1 0x12 size of this descriptor in bytes 1 bdescriptortype 1 0x01 device descriptor 2 bcdusb 2 0x0200 2.0 ? usb specification release number in binary-coded decimal. 4 bdeviceclass 1 0x00 device defined at interface level 5 bdevicesubclass 1 0x00 not used. must be set to 0. 6 bdeviceprotocol 1 0x00 not used. must be set to 0. 7 bmaxpacketsize0 1 0x08 8 bytes ? maximum packet size for endpoint zero 8 idvendor 2 0x0556 akm ? vendor id (assigned by the usb-if) 10 idproduct 2 0x0007 ak5374 ? product id (assigned by the manufacturer) 12 bcddevice 2 0x0100 1.00 ? device release number in binary-coded decimal 14 imanufacturer 1 0x01 index of string descriptor describing manufacturer 15 iproduct 1 0x02 index of string descriptor describing product 16 iserialnumber 1 0x03 index of string descriptor describing the device?s serial number 17 bnumconfigurations 1 0x01 one configuration
[ak5374] ms1197-e-00 2010/05 - 27 - 2. configuration descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x02 configuration descriptor 2 wtotallength 2 0x01af total length of data returned for this conf iguration. includes the combined length of all descriptors returned for this configuration. 4 bnuminterfaces 1 0x02 two interfaces (aud io control interface and audio streaming interface) 5 bconfigurationvalue 1 0x01 index of this configuration 6 iconfiguration 1 0x00 null string 7 bmattributes 1 0x80 bus powered device 8 maxpower 1 0x32 power consumption: 100ma 3. audio control interface descriptor 3.1 standard audio control interface descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x00 index of this interface 3 balternatesetting 1 0x00 index of this setting 4 bnumendpoints 1 0x00 endpoint 0 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0x01 audio_control 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string
[ak5374] ms1197-e-00 2010/05 - 28 - 3.2 class-specific audio control interface descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x01 header subtype 3 bcdadc 2 0x0100 1.0 ? audio device class specification release number in binary-coded decimal. 5 wtotallength 2 0x0028 total size of class-specific audio control interface descriptors (includes this descriptor) 7 bincollection 1 0x01 number of streaming interfaces 8 binterfacenr(1) 1 0x01 str eaming interface number 1 belongs to this audio control interface. 3.3 input terminal descriptor offset field size value description 0 blength 1 0x0c size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 input_terminal subtype 3 bterminalid 1 0x01 id of this terminal 4 wterminaltype 2 0x0201 terminal is microphone 6 bassocterminal 1 0x02 id of asso ciated output terminal is 0x02 7 bnrchannels 1 0x02 two channels (stereo) 8 wchannelconfig 2 0x0003 left/right front 10 ichannelnames 1 0x00 not used. must be set to 0. 11 iterminal 1 0x00 not used. must be set to 0. 3.4 output terminal descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x03 output_terminal subtype 3 bterminalid 1 0x02 id of this terminal 4 wterminaltype 2 0x0101 usb streamer 6 bassocterminal 1 0x01 id of as sociate input terminal is 0x01 7 bsourceid 1 0x03 from feature unit 8 iterminal 1 0x00 not used. must be set to 0. 3.5 feature unit descriptor offset field size value description 0 blength 1 0x0a size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x06 feature_unit descriptor subtype 3 bunitid 1 0x03 id of this feature unit 4 bsourceid 1 0x01 id to terminal to which this is connected. 5 bcontrolsize 1 0x01 size in bytes of an element of the bmacontrol() 6 bmacontrols(0) 1 0x01 d0(mute) is enable for ch 0 7 bmacontrols(1) 1 0x02 d1(volume) is enable for ch 1 (left) 8 bmacontrols(2) 1 0x02 d1(volume) is enable for ch 2 (right) 9 ifeature 1 0x00 not used. must be set to 0.
[ak5374] ms1197-e-00 2010/05 - 29 - 4. audio streaming interface descriptor 4.1 zero-bandwidth alternate setting 4.1.1 standard audio streaming interface descriptor (alt = 0) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x00 index of this setting 4 bnumendpoints 1 0x00 endpoints 0 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.2 operational alternate setting 1 4.2.1 standard audio streaming interface descriptor (alt = 1: mono, 8bit, 8k/16k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x01 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.2.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0002 pcm8
[ak5374] ms1197-e-00 2010/05 - 30 - 4.2.3 type i format type descriptor offset field size value description 0 blength 1 0x0e size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x01 one channel 5 bsubframesize 1 0x01 one byte per slot 6 bbitresolution 1 0x08 8 bits 7 bsamfreqtype 1 0x02 two frequencies 8 tsamfreq[0] 3 0x001f40 8000hz 11 tsamfreq[1] 3 0x003e80 16000hz 4.2.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x0010 1byte*16sample*1ch=16 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00 4.2.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000 4.3 operational alternate setting 2 4.3.1 standard audio streaming interface descriptor (alt = 2: mono, 16bit, 48k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x02 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string
[ak5374] ms1197-e-00 2010/05 - 31 - 4.3.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0001 pcm 4.3.3 type i format type descriptor offset field size value description 0 blength 1 0x0b size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x01 one channel 5 bsubframesize 1 0x02 two bytes per slot 6 bbitresolution 1 0x10 16 bits 7 bsamfreqtype 1 0x01 one frequency 8 tsamfreq[0] 3 0x00bb80 48000hz 4.3.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x0060 2byte*48sample*1ch=96 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00 4.3.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x00 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000
[ak5374] ms1197-e-00 2010/05 - 32 - 4.4 operational alternate setting 3 4.4.1 standard audio streaming interface descriptor (alt = 3: mono, 24bit, 32k/44.1k/48k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x03 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.4.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0001 pcm 4.4.3 type i format type descriptor offset field size value description 0 blength 1 0x11 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x01 one channel 5 bsubframesize 1 0x03 three bytes per slot 6 bbitresolution 1 0x18 24 bits 7 bsamfreqtype 1 0x03 three frequencies 8 tsamfreq[0] 3 0x007d00 32000hz 11 tsamfreq[1] 3 0x00ac44 44100hz 14 tsamfreq[2] 3 0x00bb80 48000hz 4.4.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x0090 3byte*48sample*1ch=144 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00
[ak5374] ms1197-e-00 2010/05 - 33 - 4.4.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000 4.5 operational alternate setting 4 4.5.1 standard audio streaming interface descr iptor (alt = 4: st, 8bit, 8k/11.025k/16k/22.05k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x04 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.5.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0002 pcm8 4.5.3 type i format type descriptor offset field size value description 0 blength 1 0x14 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x02 two channels 5 bsubframesize 1 0x01 one byte per slot 6 bbitresolution 1 0x08 8 bits 7 bsamfreqtype 1 0x04 four frequencies 8 tsamfreq[0] 3 0x001f40 8000hz 11 tsamfreq[1] 3 0x002b11 11025hz 14 tsamfreq[2] 3 0x003e80 16000hz 17 tsamfreq[3] 3 0x005622 22050hz
[ak5374] ms1197-e-00 2010/05 - 34 - 4.5.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x002e 1byte*23sample*2ch=46 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00 4.5.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000 4.6 operational alternate setting 5 4.6.1 standard audio streaming interface descr iptor (alt = 5: st, 16bit, 8k/16k/32k/44.1k/48k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x05 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.6.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0001 pcm
[ak5374] ms1197-e-00 2010/05 - 35 - 4.6.3 type i format type descriptor offset field size value description 0 blength 1 0x17 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x02 two channel 5 bsubframesize 1 0x02 two bytes per slot 6 bbitresolution 1 0x10 16 bits 7 bsamfreqtype 1 0x05 five frequencies 8 tsamfreq[0] 3 0x001f40 8000hz 11 tsamfreq[1] 3 0x003e80 16000hz 14 tsamfreq[2] 3 0x007d00 32000hz 17 tsamfreq[3] 3 0x00ac44 44100hz 20 tsamfreq[4] 3 0x00bb80 48000hz 4.6.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x00c0 2byte*48sample*2ch=192 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00 4.6.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000 4.7 operational alternate setting 6 4.7.1 standard audio streaming interface descriptor (alt = 6: st, 16bit, 8k/11.025k/16k/22.05k /32k/44.1k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x06 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string
[ak5374] ms1197-e-00 2010/05 - 36 - 4.7.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0001 pcm 4.7.3 type i format type descriptor offset field size value description 0 blength 1 0x1a size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x02 two channels 5 bsubframesize 1 0x02 two bytes per slot 6 bbitresolution 1 0x10 16 bits 7 bsamfreqtype 1 0x06 six frequencies 8 tsamfreq[0] 3 0x001f40 8000hz 11 tsamfreq[1] 3 0x002b11 11025hz 14 tsamfreq[2] 3 0x003e80 16000khz 17 tsamfreq[3] 3 0x005622 22050hz 20 tsamfreq[4] 3 0x007d00 32000hz 23 tsamfreq[5] 3 0x00ac44 44100hz 4.7.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x00b4 2byte*45sample*2ch=180 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00 4.7.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000
[ak5374] ms1197-e-00 2010/05 - 37 - 4.8 operational alternate setting 7 4.8.1 standard audio streaming interface descriptor (alt = 7: st, 24bit, 8k/11.025k/16k/22.05k /32k/44.1k/48k) offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x04 interface descriptor 2 binterfacenum ber 1 0x01 index of this interface 3 balternatesetting 1 0x07 index of this setting 4 bnumendpoints 1 0x01 endpoint 1 5 binterfaceclass 1 0x01 audio 6 binterfacesubclass 1 0 x02 audio_streaming 7 binterfaceprotocol 1 0x00 no t used. must be set to 0. 8 iinterface 1 0x00 null string 4.8.2 class-specific audio ge neral interface descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface descriptor 2 bdescriptorsubtype 1 0x01 as_general 3 bterminallink 1 0x02 unit id of terminal (output terminal id) 4 bdelay 1 0x01 interface delay 5 wformattag 2 0x0001 pcm 4.8.3 type i format type descriptor offset field size value description 0 blength 1 0x1d size of this descriptor in bytes 1 bdescriptortype 1 0x24 cs_interface 2 bdescriptorsubtype 1 0x02 format_type 3 bformattype 1 0x01 format_type_i 4 bnrchannels 1 0x02 two channels 5 bsubframesize 1 0x03 three bytes per slot 6 bbitresolution 1 0x18 24 bits 7 bsamfreqtype 1 0x07 seven frequencies 8 tsamfreq[0] 3 0x001f40 8000hz 11 tsamfreq[1] 3 0x002b11 11025hz 14 tsamfreq[2] 0x003e80 16000khz 17 tsamfreq[3] 3 0x005622 22050hz 20 tsamfreq[4] 0x007d00 32000hz 23 tsamfreq[5] 3 0x00ac44 44100hz 26 tsamfreq[6] 3 0x00bb80 48000hz 4.8.4 standard endpoint descriptor offset field size value description 0 blength 1 0x09 size of this descriptor in bytes 1 bdescriptortype 1 0x05 endpoint descriptor 2 bendpointaddress 1 0x81 endpoint 1, in direction 3 bmattributes 1 0x0d isochronous, synchronous, not shared 4 wmaxpacketsize 2 0x0120 3byte*48sample*2ch=288 byte/frame 6 binterval 1 0x01 one packet every frame (must be set to 1) 7 brefresh 1 0x00 8 bsynchaddress 1 0x00
[ak5374] ms1197-e-00 2010/05 - 38 - 4.8.5 class-specific isochronous audio data endpoint descriptor offset field size value description 0 blength 1 0x07 size of this descriptor in bytes 1 bdescriptortype 1 0x25 cs_endpoint 2 bdescriptorsubtype 1 0x01 general 3 bmattributes 1 0x01 sample rate control 4 blockdelayunits 1 0x00 unused 5 wlockdelay 2 0x0000
[ak5374] ms1197-e-00 2010/05 - 39 - 5. string descriptor 5.1 language id (0x00) string descriptor offset field size value description 0 blength 1 0x04 size of this descriptor in bytes 1 bdescriptortype 1 0x03 string descriptor 2 bstring 2 0x0409 ?english(us)? - language code 5.2 manufacturer (0x01) string descriptor offset field size value description 0 blength 1 0x80 size of this descriptor in bytes 1 bdescriptortype 1 0x03 string descriptor 2 bstring 126 0x0041 0x004b 0x0020 : 0x0020 manufacturer code (max 126 bytes) ?akm ? 5.3 product (0x02) string descriptor offset field size value description 0 blength 1 0x80 size of this descriptor in bytes 1 bdescriptortype 1 0x03 string descriptor 2 bstring 126 0x0041 0x004b 0x0035 0x0033 0x0037 0x0034 0x0020 : 0x0020 product code (max 126 bytes) ?ak5374 ? 5.4 serial number (0x03) string descriptor offset field size value description 0 blength 1 0x80 size of this descriptor in bytes 1 bdescriptortype 1 0x03 string descriptor 2 bstring 126 0x0041 0x0042 0x0043 0x0044 0x0031 0x0032 0x0033 0x0034 0x0020 : 0x0020 serial number code (max 126 bytes) ?abcd1234 ?
[ak5374] ms1197-e-00 2010/05 - 40 - standard requests the ak5374 only supports commands mentioned bellow. if unknown commands are input, the device returns a stall. 1. clear feature offset field size value description 0 bmrequesttype 1 0x00 0x02 device endpoint 1 brequest 1 0x01 clear_feature 2 wvalue 2 0x0000 0x0001 clear endpoint_halt clear device_remote_wakeup 4 windex 2 0x0000 0x0081 0x0082 0x0083 0x0084 0x0085 0x0086 0x0087 device or endpoint 0 endpoint 1 endpoint 2 endpoint 3 endpoint 4 endpoint 5 endpoint 6 endpoint 7 6 wlength 2 0x0000 zero 2. get configuration offset field size value description 0 bmrequesttype 1 0x80 1 brequest 1 0x08 get_configuration 2 wvalue 2 0x0000 4 windex 2 0x0000 6 wlength 2 0x0001 one 3. get descriptor offset field size value description 0 bmrequesttype 1 0x80 1 brequest 1 0x06 get_descriptor 2 wvalue 2 0x0100 0x0200 0x0300 0x0301 0x0302 0x0303 device descriptor configuration descriptor language id string descriptor imanufacturer string descriptor iproduct string descriptor iserial number string descriptor 4 windex 2 0x0000 0x0409 if wvalue is 0x0100, 0x0200 or 0x0300, windex is 0x0000. if wvalue is 0x0301, 0x0302 or 0x0303, windex is language id (0x0409: english (us)). 6 wlength 2 0xzzzz descriptor length (zzzz is assigned by host.) 4. get interface offset field size value description 0 bmrequesttype 1 0x81 1 brequest 1 0x0a get_interface 2 wvalue 2 0x0000 zero 4 windex 2 0x0000 0x0001 audio control interface audio streaming interface (alt 0 ~ 7) 6 wlength 2 0x0001 one
[ak5374] ms1197-e-00 2010/05 - 41 - 5. get status offset field size value description 0 bmrequesttype 1 0x80 0x81 0x82 device interface endpoint 1 brequest 1 0x00 get_status 2 wvalue 2 0x0000 zero 4 windex 2 0x0000 0x0001 0x0081 0x0082 0x0083 0x0084 0x0085 0x0086 0x0087 device, interface0 or endpoint 0 interface 1 endpoint 1 endpoint 2 endpoint 3 endpoint 4 endpoint 5 endpoint 6 endpoint 7 6 wlength 2 0x0002 two 6. set address offset field size value description 0 bmrequesttype 1 0x00 1 brequest 1 0x05 set_address 2 wvalue 2 0xzzzz device address (zzzz is assigned by host.) 4 windex 2 0x0000 zero 6 wlength 2 0x0000 zero 7. set configuration offset field size value description 0 bmrequesttype 1 0x00 1 brequest 1 0x09 set_configuration 2 wvalue 2 0x0001 ak5374 is set to configured state. 4 windex 2 0x0000 zero 6 wlength 2 0x0000 zero 8. set descriptor ak5374 does not support this request. 9. set feature offset field size value description 0 bmrequesttype 1 0x02 endpoint 1 brequest 1 0x03 set_feature 2 wvalue 2 0x0000 endpoint_halt 4 windex 2 0x0081 0x0082 0x0083 0x0084 0x0085 0x0086 0x0087 endpoint 1 endpoint 2 endpoint 3 endpoint 4 endpoint 5 endpoint 6 endpoint 7 6 wlength 2 0x0000 zero
[ak5374] ms1197-e-00 2010/05 - 42 - 10. set interface offset field size value description 0 bmrequesttype 1 0x01 1 brequest 1 0x0b set_interface 2 wvalue 2 0x0000 0x0001 0x0002 0x0003 0x0004 0x0005 0x0006 0x0007 zero-bandwidth alternate setting alternate setting 1 alternate setting 2 alternate setting 3 alternate setting 4 alternate setting 5 alternate setting 6 alternate setting 7 4 windex 2 0x0000 0x0001 audio control interface audio streaming interface 6 wlength 2 0x0000 zero 11. sync frame the ak5374 does not support this request.
[ak5374] ms1197-e-00 2010/05 - 43 - audio control requests 1. set feature unit control request 1-1. mute control offset field size value description 0 bmrequesttype 1 0x21 1 brequest 1 0x01 set_cur 2 wvalue 2 0x0100 mute_control | channel_0 4 windex 2 0x0300 upper byte: bunitid field in feature unit control descriptor (0x03) lower byte: audio control interface (0x00) 6 wlength 2 0x0001 length of parameter block the parameter block of mute control is the following. offset field size value description 0 bmute 1 0x01 0x00 mute not mute 1-2. volume control offset field size value description 0 bmrequesttype 1 0x21 1 brequest 1 0x01 set_cur 2 wvalue 2 0x0200 0x0201 0x0202 volume_control | channel_0 (master) volume_control | channel_1 volume_control | channel_2 4 windex 2 0x0300 upper byte: bunit id field in feature unit control descriptor (0x03) lower byte: audio control interface (0x00) 6 wlength 2 0x0002 length of parameter block the parameter block of volume control is the following. offset field size value description 0 wvolume 2 0xzzzz the value is mapped to the volume register value. ( table 8 ) (zzzz is assigned by host.) if the wvolume exceeds the range, the ak5374 adjusts the value into the range.
[ak5374] ms1197-e-00 2010/05 - 44 - 2. get feature unit control request 2-1. mute control offset field size value description 0 bmrequesttype 1 0xa1 1 brequest 1 0x81 get_cur 2 wvalue 2 0x0100 mute_control | channel_0 4 windex 2 0x0300 upper byte: bunitid field in feature unit control descriptor (0x03) lower byte: audio control interface (0x00) 6 wlength 2 0x0001 length of parameter block the parameter block of mute control is the following. offset field size value description 0 bmute 1 0x01 0x00 mute not mute 2-2. volume control offset field size value description 0 bmrequesttype 1 0xa1 1 brequest 1 0x81 0x82 0x83 0x84 get_cur get_min get_max get_res 2 wvalue 2 0x0200 0x0201 0x0202 volume_control | channel_0 (master) volume_control | channel_1 volume_control | channel_2 4 windex 2 0x0300 upper byte: bunit id field in feature unit control descriptor (0x03) lower byte: audio control interface (0x00) 6 wlength 2 0x0002 length of parameter block the parameter block of volume control is the following. offset field size value description 0 wvolume 2 0xzzyy 0x0100 brequest=get_cur, get_min, get_max: zz is mapped to the volume register value ( table 8 ). yy must be 00h. brequest=get_res: 1.0db
[ak5374] ms1197-e-00 2010/05 - 45 - eep-rom value (intvol7-0 bits, maxvol7-0 bits, minvol7-0 bits) field wvolume [hex] [dec] volume [db] step [db] 0x7f00~ff 7f 127 - 0x7e00~ff 7e 126 - : : : - 0x1900~ff 19 25 - 0x1800~ff 18 24 24.0 0x1700~ff 17 23 23.0 0x1600~ff 16 22 22.0 0x1500~ff 15 21 21.0 0x1400~ff 14 20 20.0 : : : : 0x0500~ff 05 5 5.0 0x0400~ff 04 4 4.0 0x0300~ff 03 3 3.0 0x0200~ff 02 2 2.0 0x0100~ff 01 1 1.0 0x0000~ff 00 0 0.0 0xff00~ff ff 255 -1.0 0xfe00~ff fe 254 -2.0 0xfd00~ff fd 253 -3.0 0xfc00~ff fc 252 -4.0 0xfb00~ff fb 251 -5.0 : : : : 0xe700~ff e7 231 -25.0 0xe600~ff e6 230 -26.0 0xe500~ff e5 229 -27.0 0xe400~ff e4 228 -28.0 0xe300~ff e3 227 -29.0 0xe200~ff e2 226 -30.0 0xe100~ff e1 225 1db 0xe000~ff e0 224 - : : : - 0x8100~ff 81 129 - 0x8000~ff 80 128 -31.0 - table 8. conversion table of volume control
[ak5374] ms1197-e-00 2010/05 - 46 - audio endpoint control request 1. set endpoint control request offset field size value description 0 bmrequesttype 1 0x22 1 brequest 1 0x01 set_cur 2 wvalue 2 0x0100 upper byte: sampling_freq_control (0x01) lower byte: zero 4 windex 2 0x0081 upper byte: zero lower byte: endpoint address (0x81) 6 wlength 2 0x0003 length of parameter block the parameter block of mute control is the following. offset field size value description 0 isamplefreq 3 0xyyyyyy 0x001f40: 8khz 0x002b11: 11.025khz 0x003e80: 16khz 0x005622: 22.05khz 0x007d00: 32khz 0x00ac44: 44.1khz 0x00bb80: 48khz 2. get endpoint control request offset field size value description 0 bmrequesttype 1 0xa2 1 brequest 1 0x81 get_cur 2 wvalue 2 0x0100 upper byte: sampling_freq_control (0x01) lower byte: zero 4 windex 2 0x0081 upper byte: zero lower byte: endpoint address (0x81) 6 wlength 2 0x0003 length of parameter block the parameter block of mute control is the following. offset field size value description 0 isamplefreq 3 0xyyyyyy 0x001f40: 8khz 0x002b11: 11.025khz 0x003e80: 16khz 0x005622: 22.05khz 0x007d00: 32khz 0x00ac44: 44.1khz 0x00bb80: 48khz
[ak5374] ms1197-e-00 2010/05 - 47 - system design figure 18 shows the system connection diagram. an evaluation bo ard (akd5374) is available for fast evaluation as well as suggestions for peripheral circuitry. 1k 0.1u eep- rom 10u 0.1u microphone 0.1u 0.1u 4.7u 4.7u x?tal=24mhz rd c c 1k 1 k 1k 1u 1u 1u 1u 3300 p 56k 3300 p 100k mute sw 0.1u 0.1u +5v usb 18 18 1.5k to host regulator +3.3v d- d+ 10u r-ch l-ch 10u 28 29 30 31 32 33 34 36 35 a tio vcom mpwr a vdd vss 3 micrn micrp nc ckm xto clkd r v test m 3 dp micln vss 2 1 2 3 4 5 6 7 8 9 rmuten miclp lmu ten nc testm 0 susn dvdd testm2 csn sk epao epai vss 1 AK5374EN xti xt e vref 18 17 16 15 14 13 11 12 27 26 2 5 24 2 3 2 2 21 20 19 rstn testm1 10 dn n c top view nc notes: - ?c? and ?rd? values are dependent on the crystal. when the 24mhz crystal oscillator is used (ckm pin = ?h?), at-41-24.000m-ln-n-0005 (nihon dempa kogyo) or hc49sfnb24000h0pesz1 (kyocera) is recommended. when the 16mhz crystal oscillator is used (ckm pin = ?l?), at-41-16.000m-ln-n-0005 (nihon dempa kogyo) or hc49sfnb16000h0pesz1 (kyocera) is recommended. - vss1-3 must be connected the same ground plane. - all digital input pins must not be left floating. figure 18. system connection diagram
[ak5374] ms1197-e-00 2010/05 - 48 - 1. grounding and power supply decoupling the ak5374 requires careful attention to power supply and grounding arrangements. avdd and dvdd are usually supplied from the system?s analog supply. if avdd and d vdd are supplied separately, th e power-up sequence is not critical. vss1-3 of the ak 5374 must be connected to the analog ground plane. system analog ground and digital ground must be connected together near to wh ere the supplies are brought onto the printed circuit board. decoupling capacitors must be as near to the ak5374 as possible, with the small value ceramic capacitor being the nearest. 2. voltage reference the voltage of vref is 2.2v (typ) and set the analog input range. vcom is 50%vref and a signal ground of this chip. a 4.7 f electrolytic capacitor in parallel with a 0.1 f ceramic capacitor attached to the vref pin and the vcom pin eliminates the effects of high frequency noise. no load current may be drawn from the vref pin and the vcom pin. all signals, especially clocks, should be kept away from the vref pin and the vcom pin in order to avoid unwanted coupling into the ak5374. 3. analog inputs the analog inputs are full-differential and input resistance is 20k (typ). the input signal range is typ. 0.038vpp (@mgain = +30db) and typ. 1.2vpp (@mgain = 0db), centered around the internal common voltage (typ. 1.1v). usually the input signal is ac coupled using a capacitor. the cut-off frequency is fc = 1/ (2 rc). the dc offset including the adc?s own dc offset is removed by the internal hpf (fc=0.93hz@fs=48khz). the ak5374 can accept input voltages from vss1 to vref.
[ak5374] ms1197-e-00 2010/06 - 49 - package 36pin qfn (unit: mm) a b 5.0 0.1 5.0 0.1 #1 pin indicator with laser mark c0.3 (#1 pin indicator) 0.20 0.05 #1 #9 #10 #18 #19 #27 #28 #36 3.62 0.15 3.62 0.15 0.4 0.1 0.25 (min) 0.25 (min) 0.4 0.1 0.75 0.05 0.2 0.4 s 0.10 s top view bottom view 0.08 s 0.10 m s ab 0.15 s x2 0.15 s x2 note: the exposed pad on the bottom surface of the package must be connected to the ground. material & lead finish package molding compound: epoxy resin, halogen (bromine and chlorine) free lead frame material: cu alloy lead frame surface treatment: ni/pd/au plate
[ak5374] ms1197-e-00 2010/06 - 50 - marking 5374 x xxx 1 xxxx: date code (4 digit) pin #1 indication
[ak5374] ms1197-e-00 2010/06 - 51 - revision history date (yy/mm/dd) revision reason page/line contents 10/06/03 00 first edition important notice z these products and their specifications ar e subject to change without notice. when you consider any use or application of these produc ts, please make inquiries the sales office of asahi kasei microdevices corporation (akm) or authorized distributors as to current status of the products. z descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application examples of the semiconductor products. you are fully responsible for the incorporatio n of these external circuits, application circuits, software and other related information in the design of your equipments. akm assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. akm assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. z any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. z akm products are neither intended nor au thorized for use as critical components note1) in any safety, life support, or other hazard related device or system note2) , and akm assumes no responsibility for such use, except for the use approved with the express written consent by representative director of akm. as used here: note1) a critical component is one whose failure to functi on or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. note2) a hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. z it is the responsibility of the buyer or distributor of akm products, who di stributes, disposes of , or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold akm harmless from any and all claims arising from the use of said product in the absence of such notification.

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