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4. MPEG Microprocessor : LC867240(CD PCB,IC03)
4-1. Pin description
Pin.No.
Name
1
N/P SEL OUT
2
RESET OUT
3
4
5
6
DATA OUT
7
DATA IN
8
SCK
9
STB IN
10
BUSY OUT
11
MIRQ
12
RESET
13,14
VSS
15
VSS
16,17
CF1/CF2
18
VDD
19~29
VSS
30
VIDEO LED
31
PBC
32~37
38
VDD CONTROL
39~55
N/C
TE
56
VDD
L 13942296513
57
VSS
58~61
62
63
64
65
66
67~73
74
SL +
75
SL -
76
SPEED B
77
SPEED A
78
AUDIO MUTE
79
MUTE
80
PIC LIMIT SW
81~86
87
88
DAT
89
VSS
90
VDD
91
SQ OUT
92
RWC
93
RES
94
DRF
95,96
N/C
97
www
98
VOC
99
100
RESET OUT
.
5. Key matrix
PORT
Pin 19
(K1)
Pin 20
(K2)
Pin 21
(K3)
CIRCUIT DESCRIPTION
I/O
-
No used.
O
LC74202E(IC08),LC74772V(IC07) reset out.
DI
I
LC74772V(IC07) SIN.
DO
O
No used.
CL
I
LC74772V(IC07) clock.
O
Main CPU(IC601) interface data out.
I
Main CPU(IC601) interface data in.
I
Main CPU(IC601) interface clock.
I
Main CPU(IC601) interface STB in.
O
Main CPU(IC601) interface STB out.
I
LC74202E(IC08) IRQ.
I
Reset input.
-
VSS
-
VSS
-
Xtal 6.0MHz.
-
Power supply(+5.0V).
-
VSS
O
LED(VIDEO CD) control.
-
Playback control.
-
-
No used.
O
No used.
-
No used.
-
Power supply(+5.0V).
-
VSS
-
-
No used.
CE
O
LC74202E(IC08) CE.
CL
O
LC74202E(IC08) CL.
DO
I/O
LC74202E(IC08) DO.
-
-
No used.
DI
I/O
LC74202E(IC08) DI.
-
-
No used.
O
Sled motor control(+).
O
Sled motor control(-).
O
Speed control terminal to IC01(LA9241).
O
Speed control terminal to IC01(LA9241).
O
Audio muting control.
O
BA5936S(IC04) muting control.
I
Input port of pick up limit switch.
-
-
VSS
CL
O
Command clock output to LC78630E(IC02) and LA9241(IC01).
O
Command output to LC78630E(IC02) and LA9241(IC01).
-
VSS
-
Power supply(+5.0V).
I
Sub code Q input from LC78630E(IC02).
O
LC78630E(IC02) RWC,LA9241(IC01) CE.
O
Chip reset output to LC78630E(IC02).
I
DRF from LA9241(IC01).
-
No used.
CE
-
No used.
-
No used.
x
ao
CS
O
CS to LC74772V(IC07).
y
-
No used.
i
SW1
SW2
SW3
SW4
Power
Input EX Bass Display
/Demo
Band
Tuning
Tape
A/B
Mode
Rec
CD Play
Stop
Disc
Disc 3 Disc2 Disc 1 Open
Pause
Skip
8
Description
Q Q
3
6 7
1 3
u163
.
SW5
SW6
SW7 SW8
Menu Select Enter
Play
Stop
FF
REW
Close
RXD-V323
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
9 9
Active
H
L
O
O
O
O
2 8
9 9
O
O
On
Off
CD
Other
O
7
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