Kenwood KDC-Z828 Service Manual page 6

KDC-Z828,Z828
MICROCOMPUTER'S TERMINAL DESCRIPTION
G Panel Microcomputer UPD703033GC062 (IC900 : Control uCOM)
PinNo. Pin name
1 VFD_DATA1
2 VFD_CLK
3 NC
4 VFD_DATA2
5 VFD_CLK_IN
6 EVdd
7 EVss
8 NC
9 5V_ON
10 REMO
11 NC
12 VFD_LATCH
13 VFD_GCP
14 A13
15 A14
16 A15
17 VFD_BLK
18 IC/Vpp
19 A5
20 A6
21 A7
22 A8
23 A9
24 A10
25 A11
26 A12
27 A1
28 A2
29 A3
30 A4
31 RESET
32 XT1
33 XT2
34 REGC
35 X2
36 X1
37 Vss
38 Vdd
39 CLKOUT
40 NC
41 NC
6
I/O Description
O Data output "1" to VFD driver
O Clock output to VFD driver
I Resistor connected to GND
O Data output "2" to VFD driver
I Clock input from VFD_CLK (For use in synchronization of DATA 1 and 2)
Connected to PNL 5 V
Connected to GND
O Output open.
O Power supply control output to Remote Control IC and SA_IC. 5V ON:HI, 5V OFF:LO
I Remote control signal input
O Output open.
O Latch output to VFD driver
O Luminance gradation control output to VFD driver
O Address output "A13" to external ROM
O Address output "A14" to external ROM
O Address output "A15" to external ROM
O Blank output to VFD driver
Test
O Address output "A5" to external ROM
O Address output "A6" to external ROM
O Address output "A7" to external ROM
O Address output "A8" to external ROM
O Address output "A9" to external ROM
O Address output "A10" to external ROM
O Address output "A11" to external ROM
O Address output "A12" to external ROM
O Address output "A1" to external ROM
O Address output "A2" to external ROM
O Address output "A3" to external ROM
O Address output "A4" to external ROM
I Reset input
Resistor connected to GND
OPEN
1 uF connected to GND
Connected to Main X'tal
Connected to Main X'tal
Connected to GND
Connected to PNL 5 V
OPEN
O OUTPUT OPEN
O OUTPUT OPEN
Processing Operation
Display ON: High. Display OFF: Low.