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HCD-EP313
6-12. IC Pin Function Description
• IC301
LC877140A (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
O-CLOCK
2
I-SQSO
3
O-PWM1
4
O-LDON
5
I-RESET
6
32KHz IN
7
32KHz OUT
8
VSS1
9
8.64MHz IN
10
8.64MHz OUT
11
VDD1 +5V
12
I-HOLD
13
I-VOL
14
O-MUTE
15
I-SUFFIX
16
I-KEY2
17
I-KEY1
18
I-CDTSW
19
O-CLKSHIFT
20
I-SCOR
21
O-POWER
22
O-DSG
23
I-RMC
24 to 38
SEGMENT 0 to 14
39
VDD2 +5V
40
GND
41 to 46
SEGMENT 15 to 20
47
NC
48
AMP STBY
49
O-TUMUTE
50
I-DECK1
51
I-DECK2
52
O-MOTOR
53
O-BIAS
54
TU-ON
55
O-BKLED
56
O-STBYLED
57
O-KSCAN
58
I-DECK3
59
I-POWERDOWN
60
NC
61
COM0/PL0
62
COM1/PL1
63
COM2/PL2
64
NC
65
PWM2
66
VSS3
67
VDD3 +5V
68
O-PWM3
69
O-XRST
30
I/O
O
Clock output to the CD unit
I
SUB-Q data input from the CD unit
O
PWM1 signal output to the CD unit
O
LD ON signal output to the CD unit
I
Reset signal input from the reset IC (IC302)
I
Resonator terminal (32.768kHz)
O
Resonator terminal (32.768kHz)
—
Ground terminal
I
Resonator terminal (8.64MHz)
O
Resonator terminal (8.64MHz)
—
Power supply terminal
I
Voltage detection signal input
I
Volume signal input from the encoder
O
Muting signal output
I
Model setting input terminal
I
Key input 2
I
Key input 1
I
CD door open/close switch signal input
O
Clock shift control signal output
I
SCOR signal input from the CD unit
O
Power relay control signal output
O
DSG signal output
I
Remote sensor signal input from the IC303
O
Segment signal output to the liquid crystal display module
—
Power supply terminal
—
Ground terminal
O
Segment signal output to the liquid crystal display module
—
Not used (open)
O
Standby control signal output to the power amplifier
O
Muting signal output to the tuner
I
Tape switch status signal input from the tape deck
I
Tape switch status signal input from the tape deck
O
Motor control signal output to the tape deck
O
Bias control signal output to the bias oscillation circuit
O
Tuner power supply control signal output
O
Back light control signal output
O
STANDBY LED control signal output
O
Not used (open)
I
Tape switch status signal input from the tape deck
I
Power down detection signal input
—
Not used (open)
O
Common signal output to the liquid crystal display module
O
Common signal output to the liquid crystal display module
O
Common signal output to the liquid crystal display module
—
Not used (open)
O
PWM2 signal output to the CD unit
—
Ground terminal
—
Power supply terminal
O
PWM3 signal output to the CD unit
O
Reset signal output to the CD unit
Description
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