5-2
5-4.
SYSTEM CONTROL
— SYSTEM CONTROL
PERIPHERAL
CIRCUIT INTERF
ACE (MA-335 BOARD IC161)
Signal
ASURA
RESET
ASURA
CS
S IN 0
S OUT 0
S CLK
Pin No.
$º
$¢
$∞
$§
$¶
I/O
I
I
I
O
I
I/O Level
Normally “H”, “L” when service interruption is detected or restored.
Chip select signal fr
om timer micropr
ocessor
.
V per
iod
“L
”
pulse
.
Serial comm
unica
tion da
ta from timer micropr
ocessor
.
V per
iod
“ L”
pulse.
Serial comm
unica
tion da
ta to timer micr
opr
ocessor
.
V per
iod
“L” pulse.
Serial comm
unica
tion c
lock from timer micropr
ocessor
.
V per
iod
“L” pulse.
5-5.
SYSTEM CONTROL
—
AUDIO BLOCK INTERF
ACE (MA-335 BOARD IC161)
*1.
30 Hz 50 % duty pulse a
pprox. 5 msec delayed fr
om RF SW P
.
5-3.
SYSTEM CONTROL
ACE (MA-335 BOARD IC161)
*1.
Uncer
tainl
y.
*2.
“L” when erasing protection tab is bent. “H” when not bent.
*3.
P
ause of period in propor
tion to reel rotating speed.
*4.
Approx. 2 msec period “H” pulse.
*5.
Pulse at tape running.
*6.
Normally “L”. 2 msec period “H” pulse when tape top or tape end is detected.
Signal
CAM2
MODE 1 (*8)
MODE 2 (*8)
MODE 3 (*8)
MODE 4 (*8)
(IN REC PRF)
T REEL FG
S REEL FG
T/E LED
CAP ST
OP
CAP R
V
S
T SENS
S SENS
Pin No.
9
@™
@¡
@º
!ª
!∞
^¢
^£
#™
#∞
&™
^¡
^™
I
*4
*4
*4
T
APE
THREADING
H
*1
*1
*1
*1
*2
H/L
*3
*4
H
L
*6
*6
T
APE
UNTHREADING
L
*1
*1
*1
*1
*2
H/L
*3
*4
H
H
*6
*6
ST
OP
*7
H
H
H
L
*2
H/L
H/L
*4
L
H/L
*6
*6
FF
*7
H
H
L
H
*2
*3
*3
*4
H
L
*6
*6
REW
*7
H
H
L
H
*2
*3
*3
*4
H
H
*6
*6
PB
*7
H
L
L
H
*2
*3
*3
*4
H
L
*6
*6
PB P
AUSE
*7
H
L
L
L
*2
H/L
H/L
*4
L
L
*6
*6
SLOW
*7
H
L
L
L
*2
*3
*3
*4
*5
L/*5
*6
*6
x 2
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
CUE
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
REVIEW
*7
L
L
H
L
*2
*3
*3
*4
H
H
*6
*6
REC
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
REC
P
AUSE
*7
H
L
L
L
*2
H/L
H/L
*4
L
L
*6
*6
*7.
When tr
ansition to UNLO
ADING direction :
“L
”.
When tr
ansition to LO
ADING direction :
“H”.
When CAM MO
T
OR is stopped :
Hi-Z.
*8.
When R
VS slo
w : Mode 1=”L”
When R
VS slo
w : Mode 2=”L”
When R
VS slo
w : Mode 3=”H”
When R
VS slo
w : Mode 4=”L”
Signal
AF
ENV
A
MUTE
AF REC P
AF
SWP
FULL ERS
Pin No.
%ª
#¡
2
`⁄‚‚
#§
I/O
I
O (O.D)
O
O
O (O.D)
ST
OP/FF/
REW
L
L
*1
H
T
APE
LOADING
L
L
*1
H
T
APE
UNLOADING
L
L
*1
H
PB
*1
L
*1
H
PB P
AUSE
H
L
*1
H
SLOW
H
L
*1
H
x 2
H
L
*1
H
CUE
H
L
*1
H
REVIEW
H
L
*1
H
REC
L
H
*1
L
REC P
AUSE
L
L
*1
H
AF RF en
v
elope signal input terminal for automa
tic trac
king
.
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