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Microcomputer's Terminal Description - Kenwood CS-434HU Service Manual

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MICROCOMPUTER'S TERMINAL DESCRIPTION

Microcomputer : uPD703034AYGF-M01-3BA (IC1 : X25)
Pin
Pin name
I/O
1
CD4.7V
O
2
NC
O
3
CD DATA
I/O
4
CD MOTOR
O
5
CD CLK
O
6~8
NC
O
9
EVDD
-
10
EVSS
-
11
NC
O
12
CD STOP
O
13
CD RST
O
14
12EJE SW
I
15~17
NC
O
18
LOS SW
I
19
8EJE SW
I
20
LOE/LIM SW
I
21
IC/Vpp
-
22
CD LO/EJ
I/O
23
CD MUTE
I
24,25
NC
O
26
BUS DI
I
27
BUS DO
O
28
ILL W
O
29
ILL A
O
30
LED IND
O
Description
SW for CD4.7V
Not used
CD data
SW for CD motor driver
CD clock
Not used
5V potential
GND potential
Not used
CD stop
CD reset
CD S2
Not used
CD S1
CD S4
CD S3
Write-in voltage
CD loading / ejection control
CD mute request
Not used
IEBUS data input
IEBUS data output
Illumi Control WHITE
Illumi Control AMBER
CD indicator control
CS-434HU/HC
Processing Operation
CD4.7V ON "L"
CD4.7V OFF "H"
CD mechanism starting "L"
For CD mechanism communication
Motor ON "H"
Motor OFF "L"
Motor operation "H"
For CD mechanism communication
Usual "H"
Stop "L"
CD mechanism starting "H"
Usual "H"
Reset "L"
Always "H"
Completion of ejection "H"
12cm DISC "L"
8cm DISC "H"
Load Start "L"
With no DISC "H"
Those with DISC "L"
Completion of ejection "H"
DISC chucking "H"
Usual Hi-Z
Eject "H"
Loading "L"
Mute ON "L"
Mute OFF "H"
Completion of GA-NET
Completion of GA-NET
Illumi ON "H" (AMBER "L")
Illumi OFF "L"
When it cannot decode, it blinks by 2Hz.
Illumi ON "H"(WHITE "L")
Illumi OFF "L"
When it cannot decode, it blinks by 2Hz.
Indicator ON "H"
CD loading~CD chucking~CD eject "H"
3

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