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