Sony CDX-GT72W Service Manual page 39

• IC Pin Function Description
MAIN BOARD IC303 M3062LFGPA10GP (SYSTEM CONTROL)
Pin No. Pin Name
1 DST SEL0
2 FSW IN
3 UNI SO
4 UNI SI
5 UNI CKO
6 BYTE
7 CNVSS
8 XCIN
9 XCOUT
10 RESET
11 XOUT
12 VSS
13 XIN
14 VCC1
15 NMI
16 CDM ON
17 DAVN
18 TUNER ATT IN
19 NS MASK
20 BEEP
21 TUNER ATT
22 EESIO (TU)
23 EECKO (TU)
24 NC
25 ATT
26 NC
27 I2C CKO
28 I2C SIO
29 TX
30 RX
31 NC
32 NC
33 CD TX
34 CD RX
35 E MUTE
36 E DATA
37 E CLK
38 NC
39 HOLD
40 AMP DIAG
41 AMP STB
42 NC
43 NC
44 WRI/WR
45 WAKE UP OUT
46 OPEN REQ
47 EJECT OK
48 P MONITOR
49 CD ON
50 Z DET
51 ILL IN
52 ACC IN
53 TEL ATT
I/O
I Destination setting pin 0
I D/D converter oscillator frequency count control signal input
O SONY bus serial data signal output
I SONY bus serial data signal input
O SONY bus serial clock signal output
I Connect to ground. (Fixed to "L".)
I Port for fl ash write H (Write switch)
I Sub clock signal input (32.768 kHz)
O Sub clock signal output (32.768 kHz)
I Reset signal input
O Main clock signal output (6 MHz)
— Ground pin
I Main clock signal input (6 MHz)
— Power supply pin (+3.3 V)
I Non-maskable interruption signal input
I CD mechanism deck power supply control request signal input
RDS (Radio data system) data block synchronized detect signal input
I
Not used in this set. (Open)
I Tuner mute zero cross detect signal input
O Noise mask signal output
O Beep signal output
O Tuner mute signal output
I/O Tuner EEPROM serial data signal input/output
O Tuner EEPROM serial clock signal output
O Not used. (Open)
O Mute signal output
O Not used. (Open)
O I2C bus serial clock signal output
I/O I2C bus serial data signal input/output
O Flash write data signal output
I Flash write data signal input
O Not used. (Open)
O Not used. (Open)
O CD fl ash write data signal output
I CD fl ash write data signal input
O Electronic volume mute signal output
O Spectrum analyzer serial data signal output
O Spectrum analyzer serial clock signal output
O Not used. (Open)
I External data bus (HOLD) signal input
I Amplifi er self-diagnostic test function signal input
O Amplifi er standby signal output
O Not used. (Open)
I Not used.
I External data bus (WRI/WR) signal input
O CD mechanism wake up signal output
I CD mechanism open request signal input
O CD mechanism eject control signal output
O P-SNSR process monitor signal output
I CD servo power supply on/off control signal input
I CD zero mute signal input
I Illumination detect signal input
I Accessory detect signal input
I Telephone mute detect signal input
CDX-GT72W/GT720/GT770
Description
Normally operation: "L"
Fixed to "H" for external pull-up resistor.
Not used in this set. (Open)
Not used in this set. (Open)
Not used in this set. (Open)
Fixed to "L" for external pull-down resistor.
Fixed to "H" for external pull-up resistor.
Not used in this set. (Open)
"H": ATT on
39