7-25. IC PIN FUNCTION DESCRIPTION
? MAIN BOARD IC501 M30622MA-A01FP (SYSTEM CONTROLLER (CD MECHANISM CONTROL))
Pin No.Pin NameI/OFunction
1STK-MUTEOPower amplifier on/off selection signal output terminal OL�: standby mode, OH�: on
Power on/off control signal output for the audio system (+5V) and deck, panel, audio system
2POWERO
(+7V) OL�: standby mode, OH�: power on
3F-RELAYORelay drive signal output for the speaker protect OH�: relay on
4R-RELAYORelay drive signal output for the speaker protect OH�: relay on Not used (open)
Power on/off control signal output for the CD mechanism deck section
5CD-POWERO
OL�: standby mode, OH�: power on
6LINE-MUTEOLine muting on/off control signal output terminal OL�: muting on
DBFB normal/high selection signal output to the M62493FP (IC101)
7DBFB-H/LO
OL�: DBFB high, OH�: DBFB low
8BYTEIExternal data bus line byte selection signal input terminal Fixed at OL� in this set
9CNVSSNGround terminal
10XC-INI Sub system clock input terminal (32.768 kHz)
11XC-OUTOSub system clock output terminal (32.768 kHz)
System reset signal input from the reset signal generator (IC502) OL�: reset
12RESETI
For several hundreds msec. after the power supply rises, OL� is input, then it changes to OH�
13X-OUTOMain system clock output terminal (16 MHz)
14VSSNGround terminal
15X-INI Main system clock input terminal (16 MHz)
16VCCNPower supply terminal (+5V)
17NMIINon-maskable interrupt input terminal Fixed at OH� in this set
18WAKE UPIWakeup control signal input from the fluorescent indicator tube driver (IC601) OH� active
19SCORISubcode sync (S0+S1) detection signal input from the CXD2587Q (IC101) on the CD block
Serial data transfer clock signal input from the RDS decoder on FM/AM tuner unit
20RDS-INTI
Used for the HCD-R770 and HCD-RXD7: AEP models
Serial data input from the RDS decoder on FM/AM tuner unit
21RDS-DATAI
Used for the HCD-R770 and HCD-RXD7: AEP models
22AC-CUTIAC off detection signal input from the reset signal generator (IC502) OL�: AC cut checked
23PL-CLKOSerial data transfer clock signal output to the pro-logic circuit Not used (open)
24PL-DATAOSerial data output to the pro-logic circuit Not used (open)
25PL-LATOSerial data latch pulse output to the pro-logic circuit Not used (open)
26TIMER LEDOLED drive signal output of the TIMER SELECT indicator (D632) OH�: LED on
Protect on/off detection signal input from the speaker protect circuit
27PROTECTORI
OL�: protect on, OH�: protect off
28V MUTEOMuting on/off control signal output terminal OL�: muting off Not used (open)
Communication data reading clock signal input or transfer clock signal output with the fluo-
29IIC-CLKI/O
rescent indicator tube driver (IC601)
30IIC-DATAI/O Communication data bus with the fluorescent indicator tube driver (IC601)
31NCOONot used (open)
32SQ-DATAISubcode Q data input from the CXD2587Q (IC101) on the CD block
33SQ-CLKOSubcode Q data reading clock signal output to the CXD2587Q (IC101) on the CD block
34SW MODEONot used (open)
35CD-DATAOSerial data output to the CXD2587Q (IC101) on the CD block
Connection detect signal input of the headphone jack (J701)
36RY-SWI
OL�: no connected, OH�: headphone connected
37CD-CLKOSerial data transfer clock signal output to the CXD2587Q (IC101) on the CD block
38493-LATCHOSerial data latch pulse output to the M62493FP (IC101)
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