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6-2. SYSTEM CONTROL — MECHANISM INTERFACE (MA-286 BOARD IC160)
Signal
Pin No.
I/O
EJECTED
MA-286 IC160 9
CAM2 CW
I/O
Hi-Z
MA-286 IC160 0
CAM1 V
I/O
Hi-Z
MA-286 IC160 @™
MODE 1
I
H
MA-286 IC160 @¡
MODE 2
I
L
MA-286 IC160 @º
MODE 3
I
L
MA-286 IC160 !ª
MODE 4
I
L
MA-286 IC160 !∞
REC PRF
I
L
MA-286 IC160 ^¢
T REEL FG
I
H/L
MA-286 IC160 ^£
S REEL FG
I
H/L
MA-286 IC160 #™
T/E LED
O (O.D)
*4
MA-286 IC160 *¢
CAP PWM
O (O.D)
*8
MA-286 IC160 #∞
CAP STOP
O (O.D)
L
MA-286 IC160 &™
CAP RVS
O
H
MA-286 IC160 &£
CAP DA
O
MA-286 IC160 ^¡
T SENS
I
*4
MA-286 IC160 ^™
S SENS
I
*4
*1. Uncertainly.
*2. "L" when erasing protection tab is bent. "H" when not bent.
*3. Pause of period in proportion to real rotating speed.
*4. Approx. 2 msec period "H" pulse.
*5. Pulse at tape running.
*6. "L" when tape running and CAP RVS is "H".
6-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-286 BOARD IC160)
Signal
Pin No.
I/O
MA-286 IC160 $º
ASURA RESET
I
Normally "H", "L" when service interruption is detected or restored.
MA-286 IC160 $¢
ASURA CS
I
Chip select signal from timer microprocessor. V period "L" pulse.
MA-286 IC160 $∞
S IN 0
I
Serial communication data from timer microprocessor. V period " L" pulse.
MA-286 IC160 $§
S OUT 0
O
Serial communication data to timer microprocessor. V period "L" pulse.
MA-286 IC160 $¶
S CLK
I
Serial communication clock from timer microprocessor. V period "L" pulse.
6-4. SYSTEM CONTROL — Hi-Fi AUDIO BLOCK INTERFACE (MA-286 BOARD IC160)
Signal
Pin No.
I/O
TOP/FF/REW
MA-286 IC160 %ª
AF ENV
I
AF RF envelope signal input terminal for automatic tracking.
MA-286 IC160 #¡
A MUTEN
O (O.D)
L
MA-286 IC160 2
AF REC P
O
L
MA-286 IC160 `⁄‚‚
AF SWP
O
*1
MA-286 IC160 #§
FULL ERS
O (O.D)
H
*1. 25 Hz 50 % duty pulse approx. 5 msec delayed from RF SW P.
CASSETTE
CASSETTE
TAPE
TAPE
STOP
LOADING
UNLOADING
THREADING
UNTHREADING
H
L
H
L
Hi-Z
H
H
Hi-Z
Hi-Z
Hi-Z
L
L
*1
*1
H
L
L
*1
*1
L
L
L
*1
*1
H
H
H
*1
*1
H
*2
*2
*2
*2
*2
H/L
H/L
H/L
H/L
H/L
H/L
H/L
*3
*3
H/L
*4
*4
*4
*4
*4
*8
*8
*8
*8
*8
L
L
H
H
L
L
H
H/L
*4
*4
*7
*7
*7
*4
*4
*7
*7
*7
*7. Normally "L". 2 msec period "H" pulse when tape top or tape end is detected.
*8. Captra Normal Duty pulse becomes 1.6V by LPF.
*9. Captra FR Duty pulse becomes 3.189V by LPF.
*10. Captra Denji Duty pulse becomes 0.31V by LPF.
*11. Captra Mid Duty pulse becomes 1.426V by LPF.
Captra Low Duty pulse becomes 0.684V by LPF.
I/O Level
TAPE
TAPE
PB
PB PAUSE
LOADING
UNLOADING
L
L
*1
H
L
L
L
L
*1
*1
*1
*1
H
H
H
H
FF
REW
PB
PB PAUSE
SLOW
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
L
L
L
L
L
*2
*2
*2
*2
*2
*3
*3
*3
H/L
*3
*3
*3
*3
H/L
*3
*4
*4
*4
*4
*4
*9
*9
*8
*10
*11
H
H
H
L
*5
L
H
L
L
L/*5
*7
*7
*7
*7
*7
*7
*7
*7
*7
*7
SLOW
x 2
CUE
REVIEW
H
H
H
H
L
L
L
L
*1
*1
*1
*1
H
H
H
H
REC
x 2
CUE
REVIEW
REC
PAUSE
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
H
H
L
H
H
H
H
H
H
H
L
L
H
L
H
L
L
L
L
L
*2
*2
*2
*2
*2
*3
*3
*3
*3
H/L
*3
*3
*3
*3
H/L
*4
*4
*4
*4
*4
*8
*9
*9
*8
*10
H
H
H
H
L
L
L
H
L
L
*7
*7
*7
*7
*7
*7
*7
*7
*7
*7
REC
REC PAUSE
L
L
H
L
*1
*1
L
H
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