Aiwa CR-IC90, Service Manual

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IC, MC68HC05P6SCD2776
Pin No. Pin Name I/O Description
IC DESCRIPTION
SYSTEM RESET
WAKE UP
SYSTEM
AGC CONT INPUT
SEL
AUD MUTE TIME
SEL
________
RADIO/MIC
DO
DI
SK
CS
ISD MOSI
ISD MISO
SCLK
VSS
VREF
BAT IN
PB/REC KEY
STOP/REW KEY
FF KEY
ISD SS
LED PB
LED REC
ISD RAC
TCMP
ISD INT
OSC2
OSD1
VDD
I
I
—
I
I/O
I/O
I
O
I/O
I/O
O
I
I/O
—
—
I
I
I
I
I/O
I
I
I
—
I
I/O
I/O
I
Initializes the system. Low input.
Detects the key input and starts up the system. Low input.
System selector (setting each model). High: 8RC-9.
AGC control. High: OFF. Low: ON. High: TAPE. Low: MIC.
Audio mute. Setting the recording time in the L/L mode.
High: ON. Low: OFF. High: 10 sec. Low: 45 sec.
System setting by selecting signal. High: RADIO (PAUSE). Low: MIC (OFF).
Data input from EEPROM.
Data output to EEPROM.
System clock to EEPROM.
System selector to EEPROM.
Data output to ISD.
Data input from ISD.
System clock of ISD.
GND. 0 V.
Reference voltage to A/D converter. 3.3 V TYP.
Battery voltage input. (for voltage identification). 8RC-9: BAT IN.
PB/REC KEY input. 2/3 VCC PB. 1/2 VCC REC.
STOP/REW KEY input. 2/3 VCC STOP. 1/2 VCC REW.
FF KEY input. Low: FF.
ISD system selector.
PB LED.
REC LED.
ISD RAC input.
Not used.
ISD INT input.
2.0 MHz ceramic filter.
2.0 MHz ceramic filter.
Power supply input.