Microcomputer's Terminal Description - Kenwood KDC-M4524 Service Manual

KDC-M4524/G/Y/GY
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MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER UPD703030GC011 (IC1 : X25)
pin pin name I/O
1 PLL CLK I/O
2 AFS
3 TDF DET
4 IC2 SDA I/O
4 IC2 SDA I/O
4 IC2 SDA I/O
5 IC2 SCL I/O
5 IC2 SCL I/O
5 IC2 SCL I/O
6 VDD
7 VSS
8 -
9 BEEP
10 REMO
11 R QUAL
11 -
12 R DATA
12 -
13 L CE
14 -
TE
L 13942296513
15 L INH
16 DSI
17 -
18 TEST
19~21 -
22 MOSW
23 LO/EJ I/O
24 M STOP
25 M RST
26 MUTE I/O
27 LO.E/LIM SW (SW3)
28 M MUTE L
29 M MUTE R
30 -
31 RESET
32 XT1
33 XT2
34 REGC
35 X2
36 X1
37 VSS
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38 VDD
39 CLKOUT
40 IC2 TYPE1
41 IC2 TYPE0 .
42 -
43 TYPE1
44 TYPE0
4
Description
Clock output to F/E
O Noise detection time constant switching terminal
I TDF panel detection terminal
Data input and output terminal with E-VOL
Data input and output terminal with CD mechanism
Data input and output terminal with E2PROM
Clock output to E-VOL
Clock output to CD mechanism
Clock output to E2PROM
-
-
O Not used
O Beep output terminal
I Remote control input
I RDS decoder quality input terminal
O Not used
I RDS decoder data input terminal
O Not used
O CE output to LCD driver
O Not used
O Reset output to LCD driver
O DSI control terminal
O Not used
-
O Not used
O CD mechanism motor IC switch
CD mechanism Loading/Eject switch
O Stop request to CD mechanism
O Reset output to CD mechanism
Mute terminal
I CD Down Switch detection terminal
I MUTE request from CD mechanism
I MUTE request from CD mechanism
O Not used
I
I Sub clock 32.765kHz
I Sub clock 32.765kHz
-
I Main clock 20MHz
I Main clock 20MHz
-
-
-
x ao
y
I E-VOL setting switching terminal
I E-VOL setting switching terminal i
O Not used
I Destination switching terminal
I Destination switching terminal
8
truth table
Q Q
3 6 7 1 3
e
e
u163
.
r
r
2 9 9 4 2 8
Processing Operation
FM seek/during/AF search : L, receiving : H
Panel detached : H, panel attached : L
With no RDS and destination is output L
With no RDS and destination is output L
1 5 0 5 8 2 9 9 4
Display light off, KEY reset : L Display light on,
KEY scan : H
DSI light on : H, Light off : L
Loading/Eject/Break : H
Stop/Break : Hi-Z Loading : L Eject : H
Usually : H, Reset : L
L : MUTE OFF, H : MUTE ON
H : chucking
L : MUTE request
L : MUTE request
Usually : H, Reset : L
Ceramic capacitor connected to the pair grounds
m
co
9 9
2 8 9 9