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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,
VOLUME +/–, 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)
27 INIT O Initial setting signal output terminal Used for the except CIS model
28 MODE CHECK I Destination setting terminal
29 SHIFT CLOCK O Shift clock output of the main system clock (4.19 MHz) “H” active
30 RST 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”
31 EXTAL I Main system clock input terminal (4.19 MHz)
32 XTAL O Main system clock output terminal (4.19 MHz)
33 VSS — 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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