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IC DESCRIPTION
IC, MC68HC05P6SCD2776
Pin No.
Pin Name
I/O
1
SYSTEM RESET
I
Initializes the system. Low input.
2
WAKE UP
I
Detects the key input and starts up the system. Low input.
3
SYSTEM
—
System selector (setting each model). High: 8RC-9.
AGC CONT INPUT
4
I
AGC control. High: OFF. Low: ON. High: TAPE. Low: MIC.
SEL
AUD MUTE TIME
Audio mute. Setting the recording time in the L/L mode.
5
I/O
SEL
High: ON. Low: OFF. High: 10 sec. Low: 45 sec.
________
6
RADIO/MIC
I/O
System setting by selecting signal. High: RADIO (PAUSE). Low: MIC (OFF).
7
DO
I
Data input from EEPROM.
8
DI
O
Data output to EEPROM.
9
SK
I/O
System clock to EEPROM.
10
CS
I/O
System selector to EEPROM.
11
ISD MOSI
O
Data output to ISD.
12
ISD MISO
I
Data input from ISD.
13
SCLK
I/O
System clock of ISD.
14
VSS
—
GND. 0 V.
15
VREF
—
Reference voltage to A/D converter. 3.3 V TYP.
16
BAT IN
I
Battery voltage input. (for voltage identification). 8RC-9: BAT IN.
17
PB/REC KEY
I
PB/REC KEY input. 2/3 VCC PB. 1/2 VCC REC.
18
STOP/REW KEY
I
STOP/REW KEY input. 2/3 VCC STOP. 1/2 VCC REW.
19
FF KEY
I
FF KEY input. Low: FF.
20
ISD SS
I/O
ISD system selector.
21
LED PB
I
PB LED.
22
LED REC
I
REC LED.
23
ISD RAC
I
ISD RAC input.
24
TCMP
—
Not used.
25
ISD INT
I
ISD INT input.
26
OSC2
I/O
2.0 MHz ceramic filter.
27
OSD1
I/O
2.0 MHz ceramic filter.
28
VDD
I
Power supply input.
Description
15
ELECTRICAL ADJUSTMENT
16
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