Sony CFD-G500 - IC Pin Function Description

34
CFD-G500/G500L
• IC PIN FUNCTION DESCRIPTION
• IC801 µPD789478GC-A24-8BT System Control (MAIN Board)
Pin No. Pin Name I/O Description
1, 2 NC – Not used (open)
3 VLC2 I LCD bias power supply
4 VLC1 I LCD bias power supply
5 VLC0 I LCD bias power supply
6 to 9 COM0 to COM3 O LCD common signal output
10 to 27 SEG0 to SEG17 O LCD segment signal output
28, 29 NC – Not used (open)
30 WOOFER ON/OFF O Woofer on/off control signal output
31 WOOFER 1/2 O Woofer 1/2 signal output
32 ISS1 O ISS-1 signal output (not used)
33 ISS2 O ISS-2 signal output (not used)
34 A-MUTE O Audio muting signal output
35 SCL O Clock output to the EEPROM
36 SDA I/O Data input/output with the EEPROM
37 INIT O Initialization setting signal output
38 AVDD – Power supply (A/D converter)
39 REC I REC signal input from the REC/PB switch (S301) “H”: record mode
40 C-DOOR I Detection signal input from the CD OPEN switch (S801) “L”: CD door close
41 SIMUKE I Destination setting signal input
42 MODE I Model setting signal input
43 to 45 KEY-1 to KEY-3 I Key signal input from the function keys
46 C-FSEQ I CD FSEQ synchronizing signal detection signal input from the IC701
47 AVSS – Ground (A/D converter)
48 RMC I Data input from the remote control receiver
49 REG CHK I Power supply voltage monitoring signal input
50 WP I/O WAKE UP reading signal output (interrupt signal in input mode)
51 TC-PLAY I TAPE PLAYsignal input from the TC PLAY switch (S971)
52 WRQ I CD WRQ signal input from the IC701
53 C-DO I CD DSP data input from the IC701
54 C-DI O CD DSP data output to the IC701
55 C-CLK O CD clock output to the IC701
56 C-CE O CD chip enable signal output to the IC701
57 R-MUTE O Radio muting signal output “L”: active
58 C-DRF I CD DRF signal input from the IC701
59 C-RES O CD system reset signal output to the IC701
60 R-COUNT I Radio IF count signal input from the IC2
61 R-CLK O Radio clock signal output to the IC2
62 R-DATA O Radio data output to the IC2
63 R-CE O Radio chip enable signal output to the IC2
64 V-CLOCK O Clock signal output to the sound processor (IC321)
65 V-DATA O Data output to the sound processor (IC321)
66 P-CON O Power control signal output
67 TAPE O TAPE function signal output to the IC301
68 VL O VL control signal output “L”: active
69 NC I Not used (connected to ground)
70 XT1 I Sub system clock oscillator input (32.768kHz)
71 XT2 O Sub system clock oscillator output (32.768kHz)