AIWA CDCX175
Service Manual

IC DESCRIPTION IC, pPD75518
Pin No.
1

Pin Name
NC

I/o � Not used.

Description

2

VREF IN VDD VREF LOCAL FM NC DEMO 9IU1OK CDINSW CD ACC-CONT CD RES POWER- ON NC LCDIN LCDOUT LCDCLK LCDCE � NC PLLCE PLLCL PLLDO PLLDI EJLAMP NC CDSLEEP F LAMP NC EJECT AUXIN DFPSW STOP CDCCHK NC SDA VOLCE VOLCLK
CDCDSPSIiL REMO

I � o o o

AD

converter supply.

reference

voltage

input

terminal.

3,4
5 6 7 8,9 10 11 12 13 14 15

Power

AD converter reference voltage output terminal. Outputs �H� during LOCAL mode search only. Outputs �H Not used. during reception of FM band,

I I I o o o o I o o o

Demonstration mode ON/OFF selection. (�H�: ON). 9K/10K step selection. (�H�: 9K), Disk insertion detection. (�H�: inserted). CD changer power supply control. (�H�: ON). CD reset output. (�U output during 2 ms when CPU starts after reset.) Outputs �H� while microprocessor is operating. Not used. Serial data input from LCD driver. Serial data output to LCD driver. Serial clock output to LCD driver. Chip enable output to LCD driver, Connected to GND.

.

16 17 18 19 20 21 22-24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
44

� o o o I o � o o � I I I I I/o � I o o
o

Not used. LC7216M serial inputioutput timing. Clock output to LC7216M. Serial data output to LC7216M. Serial data input from LC7216M, Lights when DPF is open. (�H�: lights). Not used. CD power supply ON/OFF output. (L: OFF). FRP lamp control output. (L: light). Not used. Eject key input, AUX detection output. (L: AUX input is connected). Panel attached/removed detection input. (�H: Stop mode detection input. (L: stop). Reset output to CDC. CDC detection signal input.
Not used.

attached).

Serial data input to electronic volume control. Chip select output to electronic volume control. Serial clock output to electronic volume control.
Communication timing during control output with CDC mechanism. modes.

o

�H�

is output

radio,

CD, CDC

and AUX

45

BEEP

o

Beep sound output terminal.

(2 kHz, 4 kHz, 500 Hz).