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CFD-EX35L
5-18. IC Pin Function Description
• IC801 µPD789478GC-A03-8BT System Control (MAIN Board)
Pin No.
Pin Name
1, 2
NC
3
VLC2
4
VLC1
5
VLC0
6 to 9
COM0 to COM3
10 to 27
SEG0 to SEG17
28, 29
NC
30
WOOFER ON/OFF
31
WOOFER 1/2
32
ISS1
33
ISS2
34
A-MUTE
35
SCL
36
SDA
37
INIT
38
AVDD
39
REC
40
C-DOOR
41
SIMUKE
42
MODE
43 to 45
KEY-1 to KEY-3
46
C-FSEQ
47
AVSS
48
RMC
49
REG CHK
50
WP
51
TC-PLAY
52
WRQ
53
C-DO
54
C-DI
55
C-CLK
56
C-CE
57
R-MUTE
58
C-DRF
59
C-RES
60
R-COUNT
61
R-CLK
62
R-DATA
63
R-CE
64
V-CLOCK
65
V-DATA
66
P-CON
67
TAPE
68
VL
69
NC
70
XT1
71
XT2
72
VDD
73
VSS
74
X1
36
I/O
—
Not used (open)
I
LCD bias power supply
I
LCD bias power supply
I
LCD bias power supply
O
LCD common signal output
O
LCD segment signal output
—
Not used (open)
O
Woofer on/off control signal output
O
Woofer 1/2 signal output (not used)
O
ISS-1 signal output
O
ISS-2 signal output
O
Audio muting signal output
O
Clock output to the EEPROM
I/O
Data input/output with the EEPROM
O
Initialization setting signal output
—
Power supply (A/D converter)
I
REC signal input from the REC/PB switch (S301) "H": record mode
I
Detection signal input from the CD OPEN switch (S701) "L": CD door close
I
Destination setting signal input
I
Model setting signal input
I
Key signal input from the function keys
I
CD FSEQ synchronizing signal detection signal input from the IC701
—
Ground (A/D converter)
I
Data input from the remote control receiver
I
Power supply voltage monitoring signal input
I/O
WAKE UP reading signal output (interrupt signal in input mode)
I
TAPE PLAYsignal input from the TC PLAY switch (S321)
I
CD WRQ signal input from the IC701
I
CD DSP data input from the IC701
O
CD DSP data output to the IC701
O
CD clock output to the IC701
O
CD chip enable signal output to the IC701
O
Radio muting signal output "L": active
I
CD DRF signal input from the IC701
O
CD system reset signal output to the IC701
I
Radio IF count signal input from the IC2
O
Radio clock signal output to the IC2
O
Radio data output to the IC2
O
Radio chip enable signal output to the IC2
O
Clock signal output to the sound processor (IC321)
O
Data output to the sound processor (IC321)
O
Power control signal output
O
TAPE function signal output to the IC301
O
VL control signal output "L": active
I
Not used (connected to ground)
I
Sub system clock oscillator input (32.768kHz)
O
Sub system clock oscillator output (32.768kHz)
—
Power supply
—
Ground
I
Main system clock oscillator input (4.19MHz)
Description
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