6-10. Ic Pin Function Description - Sony CFD-E55 Service Manual

6-10. IC PIN FUNCTION DESCRIPTION

• LCD BOARD IC501 CXP83620-011Q (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
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 (fixed at "L")
3 BUZZER O Buzzer sound signal output terminal
4 LED O LED drive signal output of the ALARM indicator (D602) "L": LED on
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)
Power on/off control signal output to the power supply circuit, and power amplifier (IC303)
21 P-CON O
"L": standby mode, "H": power on
22 DC1 I DC level check input of the dry battery and AC input (+9V check) (A/D input)
23 DC2 I DC level check input of the dry battery (+6V check) (A/D input)
24 DC3 I DC level check input of the dry battery (+3V check) (A/D input)
Key input terminal (A/D input) S601 to S606 (ALARM, TIMER, SLEEP, DISPLAY, MEM
25 KEY1 I
ENT, PLAY MODE MONO/ST ISS, SOUND keys input)
Key input terminal (A/D input) S609 to S615 (x, u, CLOCK, MEGA BASS, START/
26 KEY2 I
STOP, . # CLOCK, > 3 CLOCK keys input)
Key input terminal (A/D input) S617, S619 to S624 (POWER, BAND, VOL +, VOL –,
27 KEY3 I
PRESET –, PRESET +, AUTO PRESET keys input)
28 MODE CHECK I Destination setting terminal
Shift clock output of the main system clock (4.19 MHz) "H" active
29 SHIFT CLOCK O
Initial setting signal output terminal
System reset signal input from the reset signal generator (IC503) "L": reset
30 RST I
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 O Liquid crystal display drive bias control signal output terminal
35 to 37 VLC3 to VLC1 — Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
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 MOTOR ON O Capstan/reel motor (M301) on/off control signal output terminal
66 A-MUTE O Audio muting on/off control signal output to the electrical volume (IC302) "H": muting on
Description
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Pin No. Pin Name I/O
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
Tape function control signal output to the TA2068N (IC301)
69 TAPE O
"L": radio or CD on, "H": tape on
70 RADIO O
Power on/off control signal output for the radio +6V power supply "H": radio power on
Power on/off control signal output for the CD +5V power supply, and CD function control signal
71 O
CD
output to the TA2068N (IC301) "L": CD power on (CD on)
72
VDD — Power supply terminal (+5V)
73 TX O Sub system clock output terminal (32.768 kHz)
74 TEX I Sub system clock input terminal (32.768 kHz)
75 NC O Not used (open)
76 ISS1 O ISS 1 on/off control signal output terminal "H": ISS 1 on
77 ISS2 O ISS 2 on/off control signal output terminal "H": ISS 2 on
78 C-DOOR I CD lid open/close detection switch (S701) input terminal "L": CD lid is closed
79 TC-PLAY I Tape play detection switch (S304) input terminal "L": tape play mode
80 REG CHK I Regulator check signal input of the AC input or battery input "H" active
Description
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