KDC-205/CR, 226
KDC-2026, 3026/R
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
IC10, E2PROM clock communication
Non communication : H
Non communication : H
Data input from the LCD driver
When panel detached : L
Pull down on X34 unit, Pull up on X16 unit
Data output to the LCD driver
When panel detached, output L
Clock output to the LCD driver
When panel detached, output L
Data input from the RDS
Except RDS model : Output L
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)
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DAUGHTER UNIT (X89-2590-10)
Ref No.
Application/Functions
Operation/Condition/Compatibility
Q221,222
Audio muting SW
Audio preout is muted when the base goes “H”.
Q225
Audio muting driver
Mute driver for audio muting switch.
COMPONENTS DESCRIPTION
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