77
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7
8
9
10
11
12
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23
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27
36
37
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39
40
41
IC, CXP81952
MCAS
MRAS
BUP
AMUTE
ESK
EDO
EDI
ECS
—
RFLCT
—
LS
LDSW
PBSW
RECSW
—
—
ACOFF
SREQ
EXTDIN
SLOW
LOAD
EJECT
MREQ
DRIVE
—
—
—
MP
SRST
DGND
XTALO
XTALI
—
—
—
O
O
O
I
O
—
I
—
I
I
I
I
—
—
—
I
O
O
O
O
O
O
—
—
—
—
—
—
—
—
—
—
—
—
I
—
O
I
Pin No.
Pin Name
I/O
Description
Not used.
Audio mute signal output.
Serial clock output for EEPROM interface.
Serial data output for EEPROM interface.
Serial data input for EEPROM interface.
EEPROM interface chip select signal output.
Not used.
DISC reflectance factor detection switch input.
Not used.
Optical pickup inner circumference detection switch input.
Loading mechanism, EJECT position detection switch input.
Loading mechanism, PB position detection switch input.
Loading mechanism, RECORD position detection switch input.
Not used.
System control send request signal input for system control interface.
External DIGITAL-IN enable signal output.
Loading mechanism speed control signal input.
Loading mechanism operational direction control signal input 1.
Loading mechanism operational direction control signal input 2.
MD microprocessor send request signal output for system control interface.
EFM driver ON/OFF signal output.
Not used.
Connected to VSS.
MD microprocessor reset signal input.
Connected to VSS.
External system clock oscillation crystal connection terminal 1.
External system clock oscillation crystal connection terminal 2.
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