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Pin No.
Pin Name
56
JOG1
57
DOOR-SW
58
LOAD-SW2
59
UNLOAD-SW2
60
DISC-SW2
61
VSS
62
LOADM-2
63
LOADM+2
64
AVREF1
65
RXD2
66
TXD2
67
SQCK/SCK-SW
68
RXD1
69
TXD1
70
LDC
71
STB1
72
SI
73
SQS1
74
SO
75
SCK/SQCK
76-83
A16,14,12,7-3
84~91
D0-7
A10,A15,A13,A8,
92~99
A9,A11,A0,A1
100
VSS
1-3 Key matrix ( ) : IC14 Pin No.
VOLTAGE
A/D0(33)
4.1V
-
3.3V
-
2.5V
-
1.6V
-
0.8V
DOWN
0V
UP
CIRCUIT DESCRIPTION
I/O
I
Encoder signal B input.
I
Door open/close detector switch.
I
Load switch2 for sub pickup.
I
Unload switch2 for sub pickup.
I
Disc2 sensor.
-
GND.
O
Load motor(-) for sub pickup.
O
Load motor(+) for sub pickup.
-
D/A reference power supply.
I
UART communication input.
O
UART communication output.
O
SQCK,SCK(DOT/DSP clock) selector. L:DSP.
I
UART communication input from sub u-com.
O
UART communication output to sub u-com.
O
Laser on/off. L: Laser diode on.
O
Strobe signal output to dot driver.
I
Data input from dot driver.
I
Sub code read data input.
O
Data output to dot driver.
O
Dot driver/sub code read clock.
O
Address output to SRAM.
I/O
SRAM data bus.
O
Address output to SRAM.
-
GND.
A/D1(32)
A/D2(31)
-
OPERATION
-
RANDOM
-
CONFIRM
REPEAT
CONT.P
DISP.
PLAY/PAUSE
POWER
STOP
CD-4900M/DPF-J9030
Description
5
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