Microcomputer's Terminal Description - Kenwood KRC-29Y Service Manual

KRC-29Y/35R,379R/RY,479R/RY,481R
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3 7 63 1515 0

MICROCOMPUTER'S TERMINAL DESCRIPTION

(X14-) IC1 : µ -COM
PORT
PORT NAME I/O
No.
1 DSI
2 PANEL
3 -
4 AVSS
5 L-RST
6 L-CE
7 AVREF 1
8 -
9 PLL-DATA
10 PLL-CLK
11 L-DATA L
12 L-DATA S
13 L-CLK
14 R-DATA
15 R-QUAL
16 CH-DATA C
17 CH-DATA H
TE
L 13942296513
18 CH-CLK
19 M-STBY
20 T-END
21 ACC-DET
22 BU-DET
23 IC2 TYPE 0
24 IC2 TYPE 1
25 TYPE 0
26 TYPE 1
27 TYPE REF
28 MOTOR
29 PLL-CE
30 SD
31 ASF
32 LO/DX
33 VSS 1
34 P-MUTE
35 SVR
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36 -
37 IC2-SCL
38 IC2-SDA
39 MUTE
40 P-STBY
4
O DSI control.
I Panel detection.
- -
- GND.
O LCD driver reset.
O LCD driver chip enable.
I Reference voltage
- -
I/O Front-end communication data.
O Front-end communication clock.
I LCD driver communication data.
O LCD driver communication data.
O LCD driver communication clock.
I RDS data.
I RDS QUAL.
I Changer communication data.
O Changer communication data.
I/O Changer communication clock.
I Cassette tape stand-by detection.
I Tape end detection.
I ACC detection.
I Back-up detection.
I For service.
I For service.
I Destination discrimination.
I Destination discrimination.
O Reference voltage for destination and service.
O Cassette mechanism motor.
O Front-end communication chip enable.
I Station detection.
O Noise detection time constant switch.
O Local seeking switch.
- GND.
O Power amplifier muting.
O SVR control.
- -
O E-volume communication clock.
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y
I/O E-volume communication data.
. i
O Muting control.
O Power amplifier stand-by.
FUNCTION
Q Q
3 6 7
u163
2 9 9 4
8
OPERATING CONDITION
"L" : Panel exists.
1 3 1 5 0 5 8 2 9
"H" : Stand-by.
"H" : Run. "L" : Stop.
"L" : Normally.
"L" : Normally.
"H" : ON. "L" : OFF.
"H" : Station exists.
"L" : Station does not exist.
"H" : LO. "L" : DX.
m
co
.
2 8
9 9
9 4 2 8 9 9