Service manual

ICD-UX71/UX71F/UX81/UX81F/UX91F
25
• IC Pin Function Description
AUDIO BOARD IC1001 AK4645EZ-L (STEREO CODEC, MIC/HP AMP)
Pin No. Pin Name I/O Description
1 MPWR O Power supply pin for microphone
2 VCOM O Common voltage output Bias voltage of ADC output and DAC output
3 AVSS — Analog ground pin
4 AVDD — Analog power supply pin
5 VCOC/RIN3 O PLL loop fi lter signal output
6 I2C I Control mode select signal input “H”: I2C bus
7 PDN I Power down mode signal input “H”: Power up, “L”: Power down, reset
8 CSN/CAD0 I Chip select signal input
9 CCLK/SCL I Control clock signal input
10 CDTI/SDA I Control data signal input
11 SDTI I Audio serial data signal input
12 SDTO O Audio serial data signal output
13 LRCK I/O In/out channel clock signal input/output
14 BICK I/O Audio serial clock signal input/output
15 DVDD — Digital power supply pin
16 TVDD — Digital in/out power supply pin
17 MCKI I External master clock signal input Not used. (Connect to ground.)
18 MCKO O External master clock signal output Not used. (Open)
19 HVSS — Headphone amplifi er ground pin
20 HVDD — Headphone amplifi er power supply pin
21 HPR O R-CH headphone amplifi er signal output
22 HPL O L-CH headphone amplifi er signal output
23 MUTE O Mute signal output
24 RIN4/IN4– I R-CH analog signal input 4
25 LIN4/IN4+ I L-CH analog signal input 4
26 ROUT/LON O R-CH line output Not used. (Open)
27 LOUT/LOP O L-CH line output Not used. (Open)
28 MIN/LIN3 I Monaural analog signal input Not used. (Open)
29 RIN2/IN2– I R-CH analog signal input 2
30 LIN2/IN2+ I L-CH analog signal input 2
31 LIN1/IN1– I L-CH analog signal input 1
32 RIN1/IN1+ I R-CH analog signal input 1