41
CX-JS3
6-22.
IC PIN FUNCTION DESCRIPTION
•
PANEL BOARD IC901 LC876796B-51F8 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SYS-MUTE
O
Line muting on/off control signal output terminal
2
RDS DO
I
RDS serial data input from the FM/AM tuner unit
3
TU/EVOL DO
O
Serial data output to the FM/AM tuner unit, motor/plunger driver and electrical volume
4
CD RESET
O
Reset signal output to the CD DSP
5
CD CE
O
Chip enable signal output to the CD DSP
6
MP3 CE
O
Chip enable signal output terminal Not used
7
CLK-SHIFT
O
Shift clock signal output terminal Not used
8
LCK
O
Latch clock signal output to the motor/plunger driver
9
TU CE
O
Chip enable signal output to the FM/AM tuner unit
10
MP3 SYNC
I
SYNC signal input terminal Not used
11
RESET
I
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
12
XT1
I
System clock input terminal (32.768 kHz)
13
XT2
O
System clock output terminal (32.768 kHz)
14
VSS1
—
Ground terminal
15
CF1
I
System clock input terminal (8.64 MHz)
16
CF2
O
System clock output terminal (8.64 MHz)
17
VDD1
—
Power supply terminal (+3.3V)
18
POWER DOWN
I
Power down detection signal input terminal
19
TU-SIG/MIC
I
RDS signal input terminal
20
CD BUSY
I
Optical pick-up up/down detection and tray open/close detection signal input terminal
21
SPEANA-L
I
Spectrum analyzer drive signal input terminal (low band)
22
SPEANA-M
I
Spectrum analyzer drive signal input terminal (middle band)
23
SPEANA-H
I
Spectrum analyzer drive signal input terminal (high band)
24
KEY3
I
Front panel key input terminal (A/D input)
25
KEY2
I
Front panel key input terminal (A/D input)
26
KEY1
I
Front panel key input terminal (A/D input)
27
HOLD
I
System malfunction signal (hold signal) input from the power amplifier circuit
28
RDS CLK
I
RDS serial data transfer clock signal input from the tuner unit
29
RMC
I
Remote control signal input terminal
30 to 40
G1 to G11
O
Grid drive signal output to the fluorescent indicator tube
41 to 45
S1 to S5
O
Segment drive signal output to the fluorescent indicator tube
46
VDD3
—
Power supply terminal (+3.3V)
47
A PHOTO/S6
I/O
Deck-A tape reel rotating detection signal input and segment drive signal output to the fluorescent
indicator tube
48
B PHOTO/S7
I/O
Deck-B tape reel rotating detection signal input and segment drive signal output to the fluorescent
indicator tube
49
REC REV/S8
I/O
Recording (reverse direction) detection signal input and segment drive signal output to the
fluorescent indicator tube
50
B MODE/S9
I/O
Deck-B mode detection signal input and segment drive signal output to the fluorescent indicator
tube
51
FIX0
I/O
Not used
52
B HALF/S10
I/O
Deck-B cassette detection signal input and segment drive signal output to the fluorescent
indicator tube
53
REC FWD/S11
I/O
Recording (forward direction) detection signal input and segment drive signal output to the
fluorescent indicator tube
