KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY
KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G
5
MICROCOMPUTER’S TERMINAL DESCRIPTION
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SYSTEM MICROCOMPUTER : UPD780058GC55x (X34 : IC1)
Pin No.
Name
I/O
Description
Processing Operation
1
PANEL
I
Panel detection
H : Panel detached, L : Panel attached
2
8EJE SW
I
H : Eject is completed
Except 8cm CD model : Always output L
3
NC
O
Not used (out put L)
4
Avss
H : Panel detached, L : RESET
5
L-RST
O
LCD driver RESET
Normal H, Power off L
When 7seg model, output L
6
L-CE
O
LCD driver selection
H : Select (panel communication)
When panel attached, output L
7
AVREF1
8
NC
Not used (connected to 9pin)
9
IC10-DATA
I/O
IC10, E2PROM data communication
Non communication : H
10
IC10-CLK
O
IC10, E2PROM clock communication
Non communication : H
Non communication : H
11
L-DATAL
I
Data input from the LCD driver
When panel detached : L
Pull down on X34 unit, Pull up on X16 unit
12
L-DATAS
O
Data output to the LCD driver
When panel detached, output L
13
L-CLK
O
Clock output to the LCD driver
When panel detached, output L
14
R-DATA
I
Data input from the RDS
Except RDS model : Output L
15
R-QUAL
I
Quality input from the RDS
Except RDS model : Output L
16
CH-DATAC
I
Data input from the changer (new 5L)
Except changer model : Output L
17
CH-DATAH
O
Data output to the changer (new 5L)
When non communication, last data keeping
Except changer model : Output L
18
CH-CLK
I/O
Clock input/output with the Changer (new 5L)
Check the old and new
Except changer model : Output L
19
CH-REQH
O
Request output to the changer (new 5L)
L : Requset
Except changer model : Output L
20
NC
O
Not used (output L)
21
AFS
O
Noise detection time constant switching terminal
H : Normal, L : FM/AM seek and AF search
(When tuner SRC auto zero, L)
22~24
NC
O
Not used (output L)
25
CH-CONT
O
Changer control
H : Changer on, L : Changer off
Except changer model : Output L
26
TYPE REF
O
5V lines output for destination setting
H : During destination reading
27
SD
I
Tuner SD input
H : Station detected
28
NC
O
Not used (output L)
29
TYPE2
I
Destination type selection terminal 2
Refer to destination type list.
30
TYPE1
I
Destination type selection terminal 1
Refer to destination type list.
