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5-4. SYSTEM CONTROL – SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-325 BOARD IC161)
Signal
Pin No.
I/O
MA-325
ASURA RESET
I
Normally "H", "L" when service interruption is detected or restored
IC161$º
MA-325
ASURA CS
I
Chip select signal from timer microprocessor. V period "L" pulse
IC161$¢
MA-325
S IN
I
Serial communication data from timer microprocessor. V period "L" pulse
IC161$∞
MA-325
S OUT
O
Serial communication data to timer microprocessor. V period "L" pulse
IC161$§
MA-325
S CLK
I
Serial communication clock from timer microprocessor. V period "L" pulse
IC161$¶
5-5. SYSTEM CONTROL – Hi-Fi AUDIO BLOCK INTERFACE (MA-325 BOARD IC161)
STOP/
Signal
Pin No.
I/O
REW
MA-325
AU ENV
I
AF RF envelope signal input terminal for automatic tracking.
IC161%ª
MA-325
O
A MUTE
IC161#¡
(O.D)
MA-325
AF REC P
O
IC1612
MA-325
AF SWP
O
IC161
100
MA-325
O
FULL ERS
IC161#§
(O.D)
∗1. 30 Hz 50% duty pulse approx. 5 msec delayed from RF SW P.
I/O Level
TAPE
TAPE
PB •
FF/
PB
LOADING UNLOADING
PAUSE
L
L
L
L
H
L
L
L
L
*1
*1
*1
*1
*1
H
H
H
H
H
× 2
SLOW
CUE
REVIEW
H
H
H
H
L
L
L
L
L
*1
*1
*1
*1
H
H
H
H
PB •
REC
PAUSE
L
L
H
L
*1
*1
L
H
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