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HCD-EP315
6-12. IC Pin Function Description
• IC301
LC877140A (SYSTEM CONTROLLER)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24 to 38
39
40
41 to 46
47
48
49
50
61
62
63
64
65
66
67
68
69
I/O
O
I
O
O
I
I
O
—
I
O
—
I
I
O
I
I
I
I
O
I
O
O
I
O
—
—
O
—
O
O
I
O
O
O
—
O
—
—
O
O
Pin Name
O-CLOCK
I-SQSO
O-PWM1
O-LDON
I-RESET
32KHz IN
32KHz OUT
VSS1
8.64MHz IN
8.64MHz OUT
VDD1 +5V
I-HOLD
I-VOL
O-MUTE
I-SUFFIX
I-KEY2
I-KEY1
I-CDTSW
O-CLKSHIFT
I-SCOR
O-POWER
O-DSG
I-RMC
SEGMENT 0 to 14
VDD2 +5V
GND
SEGMENT 15 to 20
NC
AMP STBY
O-TUMUTE
I-DECK1
COM0/PL0
COM1/PL1
COM2/PL2
NC
PWM2
VSS3
VDD3 +5V
O-PWM3
O-XRST
Description
Clock output to the CD unit
SUB-Q data input from the CD unit
PWM1 signal output to the CD unit
LD ON signal output to the CD unit
Reset signal input from the reset IC (IC302)
Resonator terminal (32.768kHz)
Resonator terminal (32.768kHz)
Ground terminal
Resonator terminal (8.64MHz)
Resonator terminal (8.64MHz)
Power supply terminal
Voltage detection signal input
Volume signal input from the encoder
Muting signal output
Model setting input terminal
Key input 2
Key input 1
CD door open/close switch signal input
Clock shift control signal output
SCOR signal input from the CD unit
Power relay control signal output
DSG signal output
Remote sensor signal input from the IC303
Segment signal output to the liquid crystal display module
Power supply terminal
Ground terminal
Segment signal output to the liquid crystal display module
Not used (open)
Standby control signal output to the power amplifier
Muting signal output to the tuner
Tape switch status signal input from the tape deck
Tape switch status signal input from the tape deck
Motor control signal output to the tape deck
Bias control signal output to the bias oscillation circuit
Tuner power supply control signal output
Back light control signal output
STANDBY LED control signal output
Tape switch status signal input from the tape deck
Power down detection signal input
Common signal output to the liquid crystal display module
Common signal output to the liquid crystal display module
Common signal output to the liquid crystal display module
Not used (open)
PWM2 signal output to the CD unit
Ground terminal
Power supply terminal
PWM3 signal output to the CD unit
Reset signal output to the CD unit
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8
0
5
1
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1
3
6
7
3
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