SECTION 5
INTERFACE, IC PIN FUNCTION DESCRIPTION
SLV-798HF/998HF
5-1
5-1.
SYSTEM CONTR
A
CE (MA-318 BO
ARD IC161)
*1
Synchr
onized with dr
um rotation. 30Hz 50% duty c
*2
Normally “L“. “H“ when CTL signal is not generated.
*3
V period “H“ pulse.
*4
Selected by REC mode. “H“ in LP mode.“
*5
Composite sync signal (positi
v
e).
Signal
RF SWP
QVD
V SYNC
NT JUDGE
Pin No.
1
4
^§
!£
PB
*1
*2
*5
L
PB P
A
USE
*1
*3
*5
L
SLO
W
*1
*3
*5
L
CUE
*1
*3
*5
L
x 2
*1
*2
*5
L
REVIEW
*1
*3
*5
L
REC
*1
L
*5
L
REC P
A
USE
*1
L
*5
L
5-2.
SYSTEM CONTR
OL — SER
V
O PERIPHERAL CIRCUIT INTERF
A
CE (MA-318 BO
ARD IC161)
*1.
30Hz pulse.
*2.
Pulse at tape running.
*3.
Re
v
erse logic pulse of STEP PLS
.
*4.
“L” when drum rotation stops.
*5.
Unstable period pulse.
*6.
Pulse in period in proportional to tape speed.
*7.
360Hz pulse.
*8.
Pulse at tape running.
*9.
Approx. 2 msec period “H” or “L” pulse.
*10.
Approx. 1.5 msec period “H” or “L” pulse.
*11.
“L” when FWD SLO
W
, “H” when R
VS SLO
W
.
Signal
REC CTL
CAP ST
OP
STEP PLS
PB CTL
DRM PG
DRM FG
CAP FG
CAP D
A
DRM D
A
CTL RESET
Pin No.
7
#∞
(ª
^¶
^•
^ª
&º
&£
&¢
8
I/O
O
O (O.D)
O
I
I
I
I
O
O
I/O
ST
OP
Hi-Z
L
L
H
*4
*4
H/L
*8
*10
Hi-Z
FF
Hi-Z
Hi-Z (O.D)
L
*6
*1
*7
*6
*8
*10
Hi-Z
REW
Hi-Z
Hi-Z (O.D)
L
*6
*1
*7
*6
*8
*10
Hi-Z
T
APE
THREADING
Hi-Z
Hi-Z (O.D)
L
*5
*5
*5
*8
*10
Hi-Z
T
APE
UNTHREADING
Hi-Z
Hi-Z (O.D)
L
*5
*5
*5
*8
*10
Hi-Z
PB
Hi-Z
Hi-Z (O.D)
L
*1
*1
*7
*6
*9
*10
Hi-Z
PB P
A
USE
Hi-Z
L
L
H/L
*1
*7
H/L
*8
*10
Hi-Z
SLO
W
Hi-Z
*3
*2
*2
*1
*7
*2
*8
*10
*11
CUE
Hi-Z
Hi-Z (O.D)
L
*6
*1
*7
*6
*9
*10
Hi-Z
x 2
Hi-Z
Hi-Z (O.D)
L
*6
*1
*7
*6
*8
*10
Hi-Z
REVIEW
Hi-Z
Hi-Z (O.D)
L
*6
*1
*7
*6
*9
*10
Hi-Z
REC
*1
Hi-Z (O.D)
L
*1
*1
*7
*6
*9
*10
Hi-Z
REC P
A
USE
Hi-Z
Hi-Z (O.D)
L
H
*1
*7
H/L
*8
*10
Hi-Z
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