KRC-15R,179R,25R,279R,281R
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
PORT No. PORT NAME
I/O
FUNCTION
OPERATING CONDITION
41
AFC
O
FM noise detection / Time constant SW.
-
42
MUTE
O
Mute control.
-
43
AMP MUTE
O
Power amplifier mute.
-
44
-
-
-
-
45
CH CNT
O
Changer control.
-
46
REQ H
O
Changer request.
-
47
-
-
-
-
48
SVR
O
SVR control.
-
49
AMP STBY
O
Power amplifier stand-by.
-
50
BEEP
O
Buzzer signal output.
-
51,52
-
-
-
-
53
P.CONT
O
Power control SW.
-
54
ACC DET
I
ACC detection.
-
55
B.U. DET
I
Back-up detection.
-
56
P.ON
O
Power SW.
-
57
ILLUMI
O
Illumination SW.
-
58
FWD/REV
I
Cassette mechanism FWD/REV detection.
-
59
-
-
-
-
60
RESET
I
System reset signal input.
-
61
SEL 1
I
Destination SW.
-
62
R CLK
I
RDS clock.
-
63
REQ C
I
Changer request.
-
64
PACK IN
I
Cassette tape pack-in detection.
-
65
KEY-REQ
I
Key signal input detection.
-
66
SEL 0
I
Destination SW.
-
67
VSS 0
-
GND.
-
68
VDD 1
-
5V power supply.
-
-
Main system clock.
-
I
Main system clock.
-
-
GND.
-
-
-
-
-
5V power supply.
-
-
5V power supply.
-
I
A/D converter reference voltage.
-
I
S-meter detection.
"H" : S-meter exists.
"L" : S-meter does not exist.
77
PHONE
I
-
Navigation mute : 2.5V or more.
Telephone mute : 1V or less.
78
NOISE
I
FM noise detection.
-
79
AV CONT
O
A/D converter reference voltage.
-
80
-
-
-
-
(X14-) IC1 : µ-COM
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