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mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 1/20 www.mosanalog.com 16bits stereo audio dac integrated headphone driver with volume control features ? operation range: 2.7v~6.5v ? volume control range : 6db to ?39db, 1.5db/step ? low power consumption, 17mw at v dd =3.3v (audio code = 0000h) ? mute function ? flexibility power management ? no pop-noise ? no zero crossing distortion ? audio format : right justified, i 2 s ? serial control interface : i 2 c, spi ? output voltage adjusted by the external resisters ? excellent power supply rejection ratio(psrr) ? component less ? cost effective ? housed in ssop20(ms6334), ssop16, qfn16 package applications multimedia system, mp3, pda, portable digital audio. description the ms6334 is a 16-bits voltage-output digital-to-analog converter (dac) integrated class ab stereo headphone driver with volume control. it is fabricated in a cmos process and features extremel y low power dissipation, small package size and easy application. the accuracy of the matched coarse current sources, combined with the unique symmetrical decoding method, preclude zero-crossing distortion and ensures high quality audio reproduction. the ms6334 has good feature for portable equipment, thes e features include the low voltage operation, low power consumption, flexible power management, component less and small package ssop20, make the ms6334 ideally suited for use in portable digital audio equipments. the ms6335 only has i 2 c interface, the smaller package ssop16, qfn16 , and other functions are the same as the ms6334. block diagram + - + - av dd av ss dv dd dv ss cap hp-v dd hp-v ss bck ws data line-rin hp-rout line-lin hp-lout volume control mute dac hp hp control interface scl mode ao/cs sda line-lout line-rout opamp
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 2/20 www.mosanalog.com pin configuration ms6334 sym bol pin description hp-v dd 1 headphone supply voltage hp-rout 2 right channel headphone output line-rout 3 right channel line output line-rin 4 right channel line input cap 5 capacitor connected av ss 6 analog ground dv ss 7 digital ground mode 8 control interface selection low : i 2 c, high : spi bck 9 audio bit clock input ws 10 audio word select input data 11 audio data input scl 12 i 2 c clock input spi clock input sda 13 i 2 c data input spi data input ao/cs 14 i 2 c address option spi chip select dv dd 15 digital supply voltage av dd 16 analog supply voltage line-lin 17 left channel line input line-lout 18 left channel line output hp-lout 19 left channel headphone output hp-v ss 20 headphone ground 19 18 17 20 2 3 4 1 hp-v ss hp-lout line-lout line-lin hp-v dd hp-rout line-rout line-rin 15 14 13 16 6 7 8 5 dv dd ao/cs cap dv ss bck 12 11 9 10 ws data ms6334 scl sda av dd av ss mode ssop20, i 2 c / spi interface note: 1. mode = low, the interface is i 2 c and pin14 is address option (ao). ao = low, the address co de is 8ch (10001100b). ao = high, the address code is 88h (10001000b). 2. mode = high, the interface is spi and pin14 is chip selection (cs).
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 3/20 www.mosanalog.com m s6335 sym bol pin description hp-v dd 1 headphone supply voltage hp-rout 2 right channel headphone output line-rout 3 right channel line output line-rin 4 right channel line input cap 5 capacitor connected v ss 6 ground bck 7 audio bit clock input ws 8 audio word select input data 9 audio data input scl 10 i 2 c clock input sda 11 i 2 c data input v dd 12 supply voltage line-lin 13 left channel line input line-lout 14 left channel line output hp-lout 15 left channel headphone output hp-v ss 16 headphone ground line-rout 15 14 13 16 2 3 4 1 hp-v ss hp-lout line-lout line-lin hp-v dd hp-rout line-rin 11 10 9 12 6 7 8 5 sda scl cap bck ms6335 data v dd v ss ws ssop16, i 2 c interface no te: the control interface is i 2 c only. the address code is 8ch (10001100b). ms6335 symbol pin descripti on line-rout 1 right channel line output line-rin 2 right channel line input cap 3 capacitor connected v ss 4 ground bck 5 audio bit clock input ws 6 audio word select input data 7 audio data input scl 8 i 2 c clock input sda 9 i 2 c data input v dd 10 supply voltage line-lin 11 left channel line input line-lout 12 left channel line output hp-lout 13 left channel headphone output hp-v ss 14 headphone ground hp-v dd 15 headphone supply voltage hp-rout 16 right channel headphone output hp-lout hp-rout hp v ss line-rout bck data line-lout v ss v dd line-lin sda scl line-rin cap hp v dd ws 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 qfn16, i 2 c interface no te: the control interface is i 2 c only. the address code is 88h (10001000b).
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 4/20 www.mosanalog.com ordering information package part number packag ing marking transport media 20-pin ssop (lead free) ms6334gtr ms6334g 2.5k units tape and reel 20-pin ssop (lead free) MS6334GU ms6334g 50 units tube 16-pin ssop (lead free) ms6335gtr ms6335g 2.5k units tape and reel 16-pin ssop (lead free) ms6335gu ms6335g 100 units tube 16-pin qfn (lead free) ms6335qtr 6335 5k units tape and reel 16-pin qfn (lead free) ms6335q 6335 490 units tray rohs compliance absolute maximum ratings symbol parameter rating unit v dd positive supply voltage 6.5 v v esd electrostatic handling -3000 to 3000 v t stg storage temperature range -65 to 150 t a operating ambient temperature range -40 to 85 t j maximum junction temperature 150 t s soldering temperature, 10 seconds 260 r thja thermal resistance from junc tion to ambient in free air ssop20 ssop16 qfn16 210 210 120 /w operating ratings symbol parameter min typ max unit v dd supply voltage 2.7 - 6.5 v
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 5/20 www.mosanalog.com 3.3v electrical characteristics (ta=25 , v dd =3.3v, v ss =0v, f=1khz, r l =32 ? ; unless otherwise specified) symbol parameter conditions min typ max unit dc characteristics v cap voltage at cap 1.60 1.65 1.70 v v dc output dc level 1.60 1.65 1.70 v v fs full scale output voltage v fs =0.02* r f *v dd v fs - 10% v fs v fs +10% v i q quiescent current audio code 0000h - 5.4 - ma i pd power down current - 11 - ua cap=2.2uf (100hz) 58 63 db psrr power supply rejection ratio cap=10uf (100hz) 67 72 db cs channel separation 76 82 - db att mute attenuation 100 110 - db max gain - 6 - db a ga gain/attenuation max attenuation - -39 - db a step gain/attenuation step - 1.5 - db e ga gain/attenuation step error - 0.3 - db ac characteristics res resolution - - 16 bits - -65 -60 db thd+n total harmonic distortion plus noise - 0.056 0.1 % s/n signal-to-noise ratio 86 92 - db po maximum output power (thd+n)/s < 0.1 ? - 20 - mw vo maximum output voltage swing (thd+n)/s < 0.1 ? - 1.6 - vpp bus characteristics v ih bus high input level - - 0.7v dd v v il bus low input level 0.3v dd - - v note : r f : feedback resistor
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 6/20 www.mosanalog.com typical performance characteristics (ta=25 , r l =32 ? , r f =22k, sampling rate=4fs; unless otherwise specified) power down current (ua) supply voltage (v) quiescent current (ma) supply voltage (v) thd+n (%) supply voltage (v) power down current vs. supply voltage quiescent current vs. supply voltage thd+n vs. supply voltage code=60h code=65h f=1khz psrr (db) frequency (hz) psrr (db) frequency (hz) psrr (db) frequency (hz) psrr vs. frequency psrr vs. frequency psrr vs. frequency cap=10uf cap=10uf cap=10uf cap=2.2uf cap=2.2uf cap=2.2uf v dd =5v v rr =-20dbv v dd =3.3v v rr =-20dbv v dd =2.7v v rr =-20dbv mute attenuation (db) supply voltage (v) channel separation (db) supply voltage (v) thd+n (%) frequency (hz) mute attenuation vs. supply voltage channel separation vs. supply voltage thd+n vs. frequency v dd =2.7v v dd =3.3v f=1khz f=1khz
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 7/20 www.mosanalog.com audio timing and format the ms6334 accepts input serial data formats of 16-bit word length. left an d right data words are time multiplexed. the msb must always be first. right ws bck data lsb msb t r t hb t f t cr t lb t hw t sw left t sd t hd fig.1 timing of input signals audio data format (bck, ws, data) symbol parameter conditions min typ max unit v il input low level - - 0.3v dd v v ih input high level 0.7v dd - - v f bck input clock frequency - - 18.4 mhz br bit rate data input - - 18.4 mbits/s f ws word select input - - 384 khz t r rise time - - 12 ns t f fall time - - 12 ns t c r bit clock cycle time 54 - - ns t hb bit clock high time 15 - - ns t lb bit clock low time 15 - - ns t sd data set-up time 12 - - ns t hd data hold time to bit clock 2 - - ns t hw word select hold time 2 - - ns t sw word select set-up time 12 - - ns 0 1 2 15 14 13 210 msb lsb 15 14 13 210 msb lsb right left ws bck data fig.2 right justified format (normal format)
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 8/20 www.mosanalog.com 15 14 13 210 msb lsb right left ws bck data 1 bck 1 bck 15 14 13 210 msb lsb fig.3 i 2 s format i 2 c bus interface i 2 c interface protocol the format consists of the following ? a start condition ? a chip address byte including the chip address. (7bits) ? the 8 th bit of the byte must be ?0?.(write=0, read=1) ? the chip must always acknowledge the end of each transmitted byte. ? a data sequence (n-bytes + acknowledge) ? a stop condition scl sda 1-7 8 9 1-7 8 9 9 8 1-7 s p address r/w ack ack ack data data start condition stop condition fig.4 i 2 c format i 2 c chip address 88h 1000 00 10 7 bits address w for ms6334, mode=low, ao/cs=high, for ms6335 qfn16 package only 8ch 1000 00 11 7 bits address w for ms6334, mode=low, ao/cs=low for ms6335 ssop16 package only
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 9/20 www.mosanalog.com i 2 c data bytes description volume control msb lsb function 0 0 0 2-channel, 1.5db/step 0 0 1 left channel, 1.5db/step 0 1 0 b4 b3 b2 b1 b0 right channel, 1.5db/step gain / attenuation bits b4 b3 b2 b1 b0 value (db) value (db) 0 0 0 0 0 mute 1 0 0 0 0 -16.5 0 0 0 0 1 -39 1 0 0 0 1 -15 0 0 0 1 0 -37.5 1 0 0 1 0 -13.5 0 0 0 1 1 -36 1 0 0 1 1 -12 0 0 1 0 0 -34.5 1 0 1 0 0 -10.5 0 0 1 0 1 -33 1 0 1 0 1 -9 0 0 1 1 0 -31.5 1 0 1 1 0 -7.5 0 0 1 1 1 -30 1 0 1 1 1 -6 0 1 0 0 0 -28.5 1 1 0 0 0 -4.5 0 1 0 0 1 -27 1 1 0 0 1 -3 0 1 0 1 0 -25.5 1 1 0 1 0 -1.5 0 1 0 1 1 -24 1 1 0 1 1 0 0 1 1 0 0 -22.5 1 1 1 0 0 +1.5 0 1 1 0 1 -21 1 1 1 0 1 +3 0 1 1 1 0 -19.5 1 1 1 1 0 +4.5 0 1 1 1 1 -18 1 1 1 1 1 +6 initial state: mute power down mode msb lsb function 0 1 1 b4 b3 b2 b1 b0 power down mode selection power down bits b4=1, pull down cap pin to ground (capgd) b4=0, set the voltage of cap to middle of supply voltage (capgd) b3=1, enable opamp power down (opapd) b3=0, disable opamp power down (opapd) b2=1, enable dac power down (dacpd) b2=0, disable dac power down (dacpd) b1=1, enable headphone power down (hppd) b1=0, disable headphone power down (hppd) b0=1, enable dac mute (dacm) b0=0, disable dac mute (dacm) initial state: b0=b1=b2=b3=b4=1
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 10/20 www.mosanalog.com audi o format and power off msb lsb function 1 0 0 0 0 0 b1 b0 audio format selection and preparation for power off audio format and power off bits b1=1, enable preparation for power off b1=0, disable preparation for power off b0=1, i 2 s format b0=0, right justified format (normal format) initial state: b0=b1=0. power off : v dd down to 0v i 2 c example the audio format is selected i 2 s format. audio format code = 81h. the initial state is right justified format. data byte 1000 00 msb 11 ack start 1000 01 00 ms6335 address i 2 s format lsb ack stop dac active. code = 7bh. the initial state is enabled all power down mode when power on. ack start chip address ack 0 1 1 1 1 1 10 dacpd = 0 stop hp active, opamp active, cap to 1/2 v dd , dac keep active. code = 61h. set the voltage of cap to middle of supply voltage, the charge time is approximately 1 second. stop start chip address ack 0 1 1 0 0 1 00 capgd = 0 hppd = 0 opamp = 0 dacpd = 0 ack dac mute off. code = 60h. the chip entered active mode. stop start chip address ack 0 1 1 0 0 0 00 dacm = 0 ack set gain of 2 channel at 0db. volume control code = 1bh. stop start chip address ack 0 0 0 1 1 1 1 0 2-ch, 0db ack set attenuation of left channel at ?22.5db. volume control code = 2ch. stop start chip address ack 0 0 1 0 0 0 1 1 l-ch, -22.5db ack
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 11/20 www.mosanalog.com set attenuation of right channel at ?22.5db. volume control code = 4ch. stop start chip address ack 0 1 0 0 0 0 1 1 r-ch, -22.5db ack preparation for power off. code = 82h or 83h. stop start chip address ack 1 0 0 0 1 x 00 power off preparation = 1 ack fm application. opamp active, hp active. dac inactive, dac mute off. code = 65h. the chip enters line-in mode. stop start chip address ack 0 1 1 0 0 1 01 hppd = 0 opamp = 0 ack power down mode (shut down mode). code = 6fh the chip enters power down mode. the shut down current is approximately 11ua. stop start chip address ack 0 1 1 0 1 1 11 dacm = 1 dacpd = 1 hppd =1 opamp =1 ack spi bus interface in spi mode, scl is serial clock, sda is serial data and ao/cs latches the data word into the ms6334. a control word consist of 16bit, starting with the msb. the data bits are latched on the rising edge of scl. a rising edge of ao/cs latches the data into the ms6334 after sixteenth rising clock edge. 15 14 13 10 9 8 msb cs/ao scl sda 73 2 12 11 5 64 01 lsb fig.5 spi format spi data word description msb lsb b15 b14 b13 b12 b11 b1 0 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 0 0 0 0 0 0 0 0 reference to i 2 c data bytes description the initial state is the same as i 2 c
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 12/20 www.mosanalog.com operation procedure the sequence of operation: power on active power down active power off. the basic flowcharts are as follows: active mode all devices are active volume control volume down to mute both 2 channels mute on power off disconnect v dd v dd will be down to 0v power off power turn on power on v dd = supply voltage default codes inside the chip volume control : 00h power down : 7fh audio format : 80h default status the chip is in the power down mode, all devices are not active volume mute on active dac mute off code : 60h power up code : 6dh wait 1sec code : 61h all devices are active audio format selection right justified: 80h (default) i 2 s: 81h volume control volume down to mute both 2 channels mute on power down (shut down) volume control default volume = mute volume up/down step by step all the digital interface signals pull low i2c pull low audio inputs pull low (bck, ws, data) power off preparation code : 82h or 83h wait 0.2 sec power down code : 6fh all devices are not active except cappd keep active power down code : 6fh all devices are not active except cappd keep active keep all the digital interface signals unchanged all the digital interface signals pull low i2c pull low audio inputs pull low (bck, ws, data) v dd = gnd fig.6 operational procedure
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 13/20 www.mosanalog.com application information a mp3 with fm application the analog and digital power can be supplied as single voltage. av ss dv dd dv ss hp-v dd av dd bck ws data sda 2.2uf 300k scl headphone c f line-lin r f 47uf 32 line-lout 47uf 32 cap supply 2.7~5.5v 0.1uf 100uf hp-v ss 0.1uf 0.1uf ms6334 ao/cs mode audio decoder mcu interface c f line-rin r f line-rout fm module hp-rout hp-lout fm-l fm-r r fm r fm 8 14 7 9 8 12 13 15 7 1 16 20 6 5 17 18 4 3 19 20 v ss hp-v dd v dd bck ws data sda 2.2uf 300k scl headphone c f line-lin r f 47uf 32 line-lout 47uf 32 cap supply 2.7~5.5v 0.1uf 100uf hp-v ss 0.1uf ms6335 audio decoder mcu interface c f line-rin r f line-rout fm module hp-rout hp-lout fm-l fm-r r fm r fm note : vo=0.02269*r f *v dd vpp at 0db gain r f //c f to decide ?3db point for v d =3v, r l =32 : , r f =24k, c f =390pf, vo=1.63vpp d r l =16 : , r f =22k, c f =470pf, vo=1.50vpp fm mode, v line dc gain = r f / r fm fig.7 mp3 with fm application circuit.
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 14/20 www.mosanalog.com external dimensions ssop20 a a2 a1 d e1 e b e zd l1 detail a l 2 1 r1 r detail a h x 45 c dimension in mm dimension in inch symbol min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 a2 1.50 0.059 b 0.20 0.30 0.008 0.012 c 0.18 0.25 0.007 0.010 e 0.635 basic 0.025 basic d 8.56 8.74 0.337 0.344 e 5.79 6.20 0.228 0.244 e1 3.81 3.99 0.150 0.157 l 0.41 1.27 0.016 0.050 h 0.25 0.50 0.010 0.020 l1 0.254 basic 0.010 basic zd 1.4732 ref 0.058 ref r1 0.20 0.33 0.008 0.013 r 0.20 0.008 0 o 8 o 0 o 8 o 1 0 o 0 o 2 5 o 15 o 5 o 15 o dimension in mm dimension in inch symbol min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 a2 1.50 0.059 b 0.20 0.30 0.008 0.012 c 0.18 0.25 0.007 0.010 e 0.635 basic 0.025 basic d 4.80 5.00 0.189 0.197 e 5.79 6.20 0.228 0.244 e1 3.81 3.99 0.150 0.157 l 0.41 1.27 0.016 0.050 h 0.25 0.50 0.010 0.020 l1 0.254 basic 0.010 basic zd 0.229 ref 0.009 ref r1 0.20 0.33 0.008 0.013 r 0.20 0.008 0 o 8 o 0 o 8 o 1 0 o 0 o 2 5 o 15 o 5 o 15 o ssop 16 a a2 a1 d e1 e detail a b e zd l1 h x 45 c detail a l 2 1 r1 r
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 15/20 www.mosanalog.com qfn 16 (3x3mm) a1 b a d e a3 e e1 d1 l dimension in mm symbol min nom max a 0.70 0.75 0.80 a1 0 0.02 0.05 a3 - 0.203ref - b 0.18 0.23 0.30 d 2.9 3.00 3.10 d1 1.40 1.50 1.60 e 2.9 3.00 3.10 e1 1.40 1.50 1.60 e - 0.50bsc - l 0.30 0.40 0.50
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 16/20 www.mosanalog.com demo board 2 .7v ~ 6.5v -+ s1 s5 a c + - 2.7v ~ 6.5v audi o input led1 s4 led2 s2 led3 s3 s4 (power): power on/off power on : if this key is pressed until the led1 power on(about 3 sec),then system is power on. power off: if this key is pressed until the led1 power off(about 3 sec),then system is power off. s2 (up) & s3 (dow n): volume control the volume key is used to adjust the volume of playing, and the segment is divided to 31 levels(-39db +6db). the prime value is level 5(-33db). express full volume when led3 is bright continuously. express mute on when led2 is bright continuously. s1: reset al l i/o pins are reset to high. s5: i 2 s/normal this pin is used to switch the mode of audio format. i 2 s : a & c open. normal : a & c short.
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 17/20 www.mosanalog.com circuit : 7 4 1 + 1uf 24k hpvss 0.1u phone jack 15 10 avdd bck phone jack data cap l-in 6 2 300k 9 5 0.1u 100k 24k 14 vdd 32 line-rout line-lin sda 3 8 24k 2.2u hp-rout 24k 100k ws r-in hp-lout 12 13 16 390p + 47uf bck ws line-rin 32 data vss 100 + 47uf ms6335 (ssop16) line-lout hpvdd 390p + 100uf sda 11 scl scl + 1uf 20pf at89c2051 1 12 13 14 15 16 17 18 19 20 2 3 6 7 8 9 11 5 4 rst/vpp p1.0/ain0 p1.1/ain1 p1.2 p1.3 p1.4 p1.5 p1.6 p1.7 vcc p3.0/rxd p3.1/txd p3.2/into p3.3/int1 p3.4/t0 p3.5/t1 p3.7 xtal1 xtal2 1 2 dvcc dvcc + 10uf sda 12m 20pf scl 1k 10k
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 18/20 www.mosanalog.com demo board ir 6 1 function description lab el 1: supply input supply voltage range is 2.4v to 6.5v. label 2: this pin is used to switch the mode of audio format. i 2 s : a & c open. normal : a & c short. label 3: reset all i/o pins are reset to default values. label 4: led the led indicates ir receive d status and power status. label 5: digital signal input connected to digital audio formats as i2s, right justified and left justified. label 6: headphone jack used 3.5mm diameter of headphone with 32ohm 1 4 a c 2 5 3
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 19/20 www.mosanalog.com ir controller power on/off : the power key. press the key once to set power-on or power-off for ms6864. the default values are attenuation ?33db. vol+ : the volume-up switch for stereo channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +6db. the default value is -33db on initial status. l-channel and r-channel are active synchronic. vol- : the volume-down switch for stereo channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to -39db. l-channel and r-channel are active synchronic. vol_l+ : the volume-up switch for left channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +6db. vol_l - : the volume-down switch for left channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to -39db. vol_r+ : the volume-up switch for right channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +6db. vol_r- : the volume-down switch for right channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to -39db. mute : press the switch once to enter mute-on or mute-off. the default status is mute-off on initial status.
mosa ms6334/6335 16bits stereo audio dac integrated hp driver with volume control rev 5 20/20 www.mosanalog.com circuit hpvdd 1 hp-rout 2 line-rout 3 line-rin 4 cap 5 vss 6 bck 7 ws 8 hpvss 16 hp-lout 15 lin e-lou t 14 lin e-lin 13 vdd 12 sda 11 scl 10 data 9 u1 ms6335 c10 47u c9 104 r4 24k c11 361 c8 104 j4 phonejack y1 12m r9 24k c12 30 1 2 j3 avdd c3 47u c5 30 c6 361 r6 1k r7 1k r8 1k c4 2.2u rst 1 p3.0 2 p3.1 3 xtal2 4 xtal1 5 p3.2 6 p3.3 7 p3.4 8 p3.5 9 gnd 10 vcc 20 p1.7 19 p1.6 18 p1.5 17 p1.4 16 p1.3 15 p1.2 14 p1.1 13 p1.0 12 p3.7 11 j6 at89c2051 c14 20 c15 20 1 2 j5 dvcc r10 10k s1 rst c13 10u d1 power d2 vol- d3 vol+ bck ws data fm_r tex t 1 2 3 j1 lin e in 1 2 3 4 j2 audio format r3 100k r2 100k l1 r1 24k r5 24k r11 1k r12 1k r13 1k c2 1u c1 1u fm_l c7 100u s5 i2 s/no rmal r14 300k r15 220 sda scl sda scl vc 1 ir 3 gnd 2 q1 ir + r16 10 k c16 47 u +c17 470p dgnd ir_ in ir _ in

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