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31
HCD-NE5
CONTROL BOARD IC801 LC876980B-52T3-E (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
MI-ACK
I
Acknowledge signal input from the MP3 decoder
2
MP3-RST
O
Reset signal output to the MP3 decoder
3
MP3-REQ
I
Request signal input from the MP3 decoder
4
MI-CS
O
Chip select signal output to the MP3 decoder
5
MI-LP
O
Serial data latch pulse output to the MP3 decoder
6
MP3-STB
O
Standby control signal output to the MP3 decoder
7
XTCN
O
Oscillation circuit control signal output to the CD DSP
“H”: auto oscillation, “L”: oscillation off
8
X-RST
O
Reset signal output to the CD DSP
9
XLT
O
Serial data latch pulse output to the CD DSP
10
SCOR
I
Subcode sync (S0+S1) detection signal input from the CD DSP
11
RESET
I
Reset signal input from the reset switch “L”: reset For several hundreds msec. after the power
supply rises, “L” is input, then it changes to “H”
12
I-XT1
I
Sub system clock input terminal (32.768 kHz)
13
O-XT2
O
Sub system clock output terminal (32.768 kHz)
14
VSS1
—
Ground terminal
15
XIN
I
Main system clock input terminal (10 MHz)
16
XOUT
O
Main system clock output terminal (10 MHz)
17
VDD1
—
Power supply terminal (+3.2V)
18
I-POWER_
MONITOR
I
Power monitor input terminal
19
MODEL DETECT
I
Model destination setting terminal
20
KEY1
I
Front panel key input terminal (A/D input)
21
AREA
I
Model destination setting terminal
22
VOL_ENCODER
I
Dial pulse input of the rotary encoder (for VOLUME control)
23
I_POWER_DOWN
I
Power down detection signal input terminal “L”: power down, normally : “H”
24
TA-SW
I
Cassette in/out detect switch signal input from the tape mechanism deck “L”: cassette in
25
RDS-DATA
I
RDS serial data input from the FM/AM tuner unit (AEP, UK models only)
26
RDS-CLK
I
RDS serial data transfer clock signal input from the tuner unit (AEP, UK models only)
27
KEY0
I
Front panel key input terminal (A/D input)
28
F-DATA
O
Serial data output to the electrical volume
29
RMC_IN
I
Remote control signal input from the remote control receiver
30
NC VREF
—
Not used
31 to 42
G1 to G12
O
Grid drive signal output to the fluorescent indicator tube
43 to 45
S1 to S3
O
Segment drive signal output to the fluorescent indicator tube
46
VDD3
—
Power supply terminal (+3.1V)
47 to 50
S4 to S7
O
Segment drive signal output to the fluorescent indicator tube
51
VP
—
Power supply terminal (–29V)
52 to 60
S8 to S16
O
Segment drive signal output to the fluorescent indicator tube
61 to 65
NC
—
Not used
66
CD OPEN
I
CD lid open/close detection switch input terminal
•
IC Pin Function Description