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QQ
3 7 6 3 1 5 1 5 0
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/
T E
L 1 3 9 4 2 2 9 6 5 1 3
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.
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.
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I/O Level
TAPE
TAPE
PB •
FF/
PB
LOADING UNLOADING
PAUSE
L
L
L
L
H
L
L
L
L
L
*1
*1
*1
*1
*1
H
H
H
H
H
x
a o
y
i
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8
Q
Q
× 2
3
7
6
3
1
SLOW
CUE
REVIEW
REC
H
H
H
H
L
L
L
L
L
H
*1
*1
*1
*1
*1
H
H
H
H
L
u 1 6 3
.
2
4
9
9
8
PB •
5
1
5
0
8
9
2
4
9
PAUSE
L
L
*1
H
m
c o
2
9
9
8
2
9
9
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