Microcomputer's Terminal Description - Kenwood CKDC-392V/VA Service Manual

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MICROCOMPUTER'S TERMINAL DESCRIPTION

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SYSTEM MICROCOMPUTER : UPD780058GC555 (X34 : IC1)
Pin No. Name
1 PANEL
2 8EJE SW
3 NC
4 Avss
5 L-RST
6 L-CE
7 AVREF1
8 NC
9 IC10-DATA
10 IC10-CLK
11 L-DATAL
TE
L 13942296513
12 L-DATAS
13 L-CLK
14 R-DATA
15 R-QUAL
16 CH-DATAC
17 CH-DATAH
18 CH-CLK
19 CH-REQH
20 NC
21 AFS
22~24 NC
25 CH-CONT
26 TYPE REF
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27 SD
28 NC
.
29 TYPE2
30 TYPE1
I/O Description
I Panel detection
I
O Not used (out put L)
O LCD driver RESET
O LCD driver selection
- 5V
- Not used (connected to 9pin)
I/O IC10, E2PROM data communication
O IC10, E2PROM clock communication
I Data input from the LCD driver
O Data output to the LCD driver
O Clock output to the LCD driver
I Data input from the RDS
I Quality input from the RDS
I Data input from the changer (new 5L)
O Data output to the changer (new 5L)
I/O Clock input/output with the Changer (new 5L)
O Request output to the changer (new 5L)
O Not used (output L)
O Noise detection time constant switching terminal
O Not used (output L)
O Changer control
O 5V lines output for destination setting
I Tuner SD input
x ao u163
y
O Not used (output L)
i
I Destination type selection terminal 2
I Destination type selection terminal 1
2 9
8
H : Panel detached, L : Panel attached
H : Eject is completed
Except 8cm CD model : Always output L
H : Panel detached, L : RESET
Normal H, Power off L
When 7seg model, output L
H : Select (panel communication)
When panel attached, output L
Non communication : H
Non communication : H
Non communication : H
When panel detached : L
Q Q
Pull down on X34 unit, Pull up on X16 unit
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When panel detached, output L
When panel detached, output L
Except RDS model : Output L
Except RDS model : Output L
Except changer model : Output L
When non communication, last data keeping
Except changer model : Output L
Check the old and new
Except changer model : Output L
L : Requset
Except changer model : Output L
H : Normal, L : FM/AM seek and AF search
(When tuner SRC auto zero, L)
H : Changer on, L : Changer off
Except changer model : Output L
H : During destination reading
H : Station detected
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.
Refer to destination type list.
Refer to destination type list.
CKDC-392V/VA/VD/VDA
CKDC-492V/VD
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Processing Operation
0 5 8 2 9 9 4 2 8
m
9 9
9 9
5