– 49 –
6-12.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 CXP83620-007Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
C-SCOR
I
Subcode sync (S0+S1) detection signal input from the CXD2589Q (IC703)
2
RMC
I
Sircs remote control signal input terminal Not used (open)
3, 4
NC
O
Not used (open)
5
C-SENS
I
Internal status signal (sense signal) input from the CXD2589Q (IC703)
6
C-SENS2
I
Internal status signal (sense signal) input from the CXA1992BR (IC701)
7
C-SQCK
O
Subcode Q data reading clock signal output to the CXD2589Q (IC703)
8
C-SQSO
I
Subcode Q data input from the CXD2589Q (IC703)
9
C-RST
O
System reset signal output to the CXA1992BR (IC701) and CXD2589Q (IC703) “L”: reset
10
C-CLOCK
O
Serial data transfer clock signal output to the CXD2589Q (IC703)
11
C-LATCH
O
Serial data latch pulse signal output to the CXD2589Q (IC703)
12
C-DATA
O
Serial data output to the CXD2589Q (IC703)
13
REC
I
Record/playback detection signal input terminal “L”: recording mode, “H”: playback mode
14
R-COUNT
I
PLL serial data input from the FM/AM PLL (IC2)
15
R-DATA
O
PLL serial data output to the FM/AM PLL (IC2)
16
R-CLOCK
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC2)
17
R-LATCH
O
PLL serial data latch pulse signal output to the FM/AM PLL (IC2)
18
V-LATCH
O
Serial data latch pulse signal output to the electrical volume (IC302)
19
V-DATA
O
Serial data output to the electrical volume (IC302)
20
V-CLOCK
O
Serial data transfer clock signal output to the electrical volume (IC302)
21
P-CON
O
Power on/off control signal output to the power supply circuit and power amplifier (IC303 and
IC304) “L”: standby mode, “H”: power on
22
NC
O
Not used (open)
23
KEY1
I
Key input terminal (A/D input) S601 to S607 (OPERATE, SLEEP, TIMER, MEGA BASS,
/–, SOUND keys input)
24
KEY2
I
Key input terminal (A/D input)
S609 to S614 (CD
·∏
,
π
, TIME SET +
+
TUNE +, TIME SET –
=
TUNE –, PLAY
MODE MONO/ST ISS, DISPLAY ENT MEMORY keys input)
25
KEY3
I
Key input terminal (A/D input) S617 to S624 (RADIO BAND, STANDBY, CLOCK, PRESET
+/–, FUNCTION, LOOP AUTO PRESET, FLASH keys input)
26
NC
O
Not used (open)
O
Initial setting signal output terminal Used for the except CIS model
I
Destination setting terminal
O
Shift clock output of the main system clock (4.19 MHz) “H” active
I
System reset signal input from the reset signal generator (IC503) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
I
Main system clock input terminal (4.19 MHz)
O
Main system clock output terminal (4.19 MHz)
—
Ground terminal
34
VL
—
35 to 37
VLC3 to VLC1
—
38 to 41
COM0 to COM3
O
Common drive signal output to the liquid crystal display (LCD501)
42 to 64
SEG0 to SEG22
O
Segment drive signal output to the liquid crystal display (LCD501)
65
NC
O
Not used (open)
66
A-MUTE
O
Audio muting on/off control signal output to the electrical volume (IC302) “H”: muting on
67
B-MUTE
O
Tuner muting on/off control signal output terminal “H”: muting on
68
C-MUTE
O
Digital muting on/off control signal output to the CXD2589Q (IC703) “H”: muting on
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
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