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KRC-208S/218,268/288,28MR
(X14-) IC1 : µ-COM
PORT No.
PORT NAME
1
XIN
2
GND
L DATA L
3
4
L DATA S
L CLK
5
6
L CE
SDA
7
8
PLL DATA
9
PLL CLK
10
SD
DATA C
11
12
DATA H
13
CH CLK
14
-
15
MOTOR
16
SCL
17-24
-
25
AM+B
FM+B
26
27
PACK IN
28
FF/REW
29,30
GND
VDD
31
32
REQ C
33
MUTE
34
CH CON
35
REQ H
36
SVR
AMP STBY
37
38
AMP MUTE
P CON
39
40
ANT. CON
41
SW5
ILL
42
43
-
44
BEEP
-
45-47
ROLL OFF
48
49
N.CAN
50
SEL1
51
SEL2
-
52
53
EQ MUTE
54
FWD/REV
55
-
56
REMO
57-60
-
61
ACC DET
62
BU DET
S METER
63
64
PANEL
GND
65,66
67
HOLD
VDD
68
GND
69,70
71,72
-
73
VDD
74,75
GND
76
VSS
-
77,78
79
GND
XOUT
80
4
CIRCUIT DESCRIPTION
I/O
FUNCTION
µ-com clock. (4.5MHz)
I
-
GND.
I
LCD driver data.
O
LCD driver data.
O
LCD driver clock.
O
LCD driver chip enable.
I/O E-volume data.
I/O Tuner data.
O
Tuner clock.
I
Tuner signal detection.
I
Changer data.
Head unit data.
O
I/O Changer clock.
-
No connection.
O
Mechanism motor.
E-volume clock.
O
-
No connection.
AM power supply.
O
O
FM power supply.
I
Cassette tape pack-in.
I
FF/REW signal.
-
GND.
-
VDD.
I
Request from changer.
O
Mute.
Changer control.
O
O
Request to head unit.
O
Power IC (IC4) discharge control.
O
Power IC (IC4) stand-by.
O
Power IC (IC4) mute.
O
P.CON for external amplifier.
Power antenna.
O
Circumambient circuit power supply control.
O
O
Illumination.
-
No connection.
Buzzer. (2KHz)
O
-
No connection.
I
Destination switch.
I
Destination switch.
I
Destination switch.
Destination switch.
I
-
No connection.
O
Tape equalizer mute.
I
FWD/REV.
-
No connection.
Remote control.
I
-
No connection.
I
ACC detection.
I
Back-up detection.
I
Tuner signal meter.
Panel on/off.
I
-
GND.
I
Clock stop.
-
VDD.
-
GND.
-
No connection.
-
VDD.
-
GND.
-
GND.
-
No connection.
-
GND.
µ-com clock. (4.5MHz)
O
OPERATING CONDITION
-
-
-
-
-
-
-
-
-
"H" : Tuner signal exists.
"L" : Tuner signal does not exist.
-
-
-
-
-
-
-
-
-
"L" : Pack in.
"H" : Ejection.
"L" : FF/REW.
"H" : Play.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
"L" : Panel on.
"H" : Panel off.
-
-
-
-
-
-
-
-
-
-
-
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