Microcomputer's Terminal Description - Kenwood ez500 Service Manual

EZ500
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MICROCOMPUTER'S TERMINAL DESCRIPTION

3 7 63 1515 0
SYSTEM MICROCOMPUTER : UPD703030GC052 (X34 : IC1)
Pin No. Pin Name
1 PLL CLK
2 Not used
3 PANEL-DET
4 IC2 SDA
5 IC2 SCL
6 VDD
7 VSS
8 FLIP-DET
9 BEEP
10 REMO
11,12 Not used
13 L CE
14,15 Not used
16 DSI
TE
17 DIM CON
L 13942296513
18 TEST
19 ILL CON
20 VOL A
21 VOL B
22 MOSW
23 LO/EJ
24 M STOP
25 M RST
26 MUTE
27 LOE/LIM SW
28 M-MUTE L
29 M-MUTE R
30 PANEL 5V
31 RESET
32 XT1
33 XT2
34 REGC
www 35 X2
36 X1
37 VSS
.
38 VDD
39 CLKOUT
4
I/O Application
I/O CLK output terminal to F/E
O
I Panel DET terminal
I/O DATA input/output terminal with E-VOL
I/O CLK output terminal to E-VOL
-
-
I Flip DET terminal
O BEEP output terminal
I Remote control input
O Destination other than E and E2
O CE output terminal for LCD driver
O Non variable illumination switch destination
EJECT KEY ILL, GUIDE ILL,
I/O
DSI control terminal
O Dimmer control terminal
-
O During FLIP DET ILL+B OFF
I Volume key input
I Volume key input
O CD mechanism MOTOR IC SW
I/O CD mechanism LOADING, EJECT switching
O STOP request to CD mechanism
O Reset output terminal to CD mechanism
I/O MUTE terminal
I CD DOWN SW DET terminal
I MUTE request terminal from CD mechanism
I MUTE request terminal from CD mechanism
I/O Panel 5V control terminal
I
I
I
-
I
I
x ao
y
-
i
-
-
8
Truth
value table
No panel DET : L, Panel DET : H
L : Panel DET, H : Panel flippable
FLIP-DET "H" and PANEL-DET is "L" : "H" / "L"
FLIP-DET "H" and PANEL-DET is "H" : "L"
Q Q
50ms interval : "H" / "L"
3 6 7 1 3
During FLIP DET "L" : H
When looking at VOL, also look at FLIPDET
When looking at VOL, also look at FLIPDET
Loading, Eject, Brake : H
STOP, Brake : Hi-Z, Loading : L, Eject : H
Normal : H, Reset : L
Hi-Z : Mute ON, L : Mute OFF
H : Chucking
L : Mute request
L : Mute request
Panel DET : L, Detached, Momentary power down : H
Normal : H, Reset : L
32kHz
32kHz
Connect 1µF condenser to GND
20MHz
20MHz
u163
.
2 9 9 4 2 8
Processing Operation Description
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9