Pin
No.
Mark
I/O
Division
Function
33
SCTSY
I
ADIP/sub A synchronize
signal from IC101 input
terminal
34
CFSYNC
I
MDA synchronize signal
from IC101 input trminal
(11.6ms pulse)
35 OPENSW
I
Disc cover open/close
switch det. input terminal
(“H”:open, “L”:close)
36
LCD
DATA
O
LCD driver data output
terminal
37
—
—
Connected to GND
38
LCD CK
I
LCD driver clock input
terminal
39
DEBUG
O
Micro computer debug
output terminal (Not used,
open)
40 DOCTOR
O
Doctor mode input terminal
41
NC
—
Not used, open
42 CHARGE1
O
Recharging control output
terminal
43
NRECP
O
Track jump det. output
terminal
44
EEPCS
O
EEPROM chip select
output terminal
45
EEPCK
O
EEPROM clock output
terminal
46 EEPDATA0 O
EEPROM data output
terminal
47 EEPDATAI
I
EEPROM data input
terminal
48
PLAY
KEY
I
PLAY/PAUSE KEY input
terminal
49
REC
KEY
I
REC/PAUSE KEY input
terminal
50
DC IN
WAKEUP
I
DC IN wake up input
terminal
51
REG
I
Area selection input
terminal
52
MHEAD
UP
I
Magnetic head down input
terminal
53 PROTECT
I
Erase prevention switch
input terminal
46
