38
12-2 RS-232C specifications
9PIN D-Sub
1 2 3 4 5
6
9
Pin NO. Signals
Operations
Direction of
signals
2
RXD
Receive data
VTR
p
PC
3
TXD
Transmit data
VTR
[
PC
4
DTR
Data terminal ready
VTR
[
PC
5
GND
Signal ground
6
DSR
Data set ready
VTR
p
PC
Note: PC means a controller such as a personal computer.
Mode
: Non-synchronous
Character length : 8 bits
Parity check
: None
Start bit
: 1
Stop bit
: 1
Data rate
: 9600 bps
Bit structure
ASCII code table
Use this table to express the values or alphabets on the
RS-232C interface.
0
1 2
3
4
5
6
7
8
9
A B C D E F
0
SP 0
P
p
1
1
A Q a
q
2
2
B R b
r
3
3
C S c
s
4
4
D T
d
t
5
5
E U e
u
6
6
F
V f
v
7
7
G W g
w
8
8
H X h
x
9
9
I
Y i
y
A
J
Z
j
z
B
K
k
C
L
l
D
M
m
E
N
n
F
O
o
D6
D7
D4
D5
D2
D3
D0
D1
Start bit
Stop bit
12 RS-232C INTERFACE
39
12 RS-232C INTERFACE
12-3 RS-232C commands
An optional RS-232C interface can be installed in this unit
and connected to a personal computer. Data transmitted and
received via the RS-232C interface enables the PC to control
the VCR and gather status and operating information.
RXD
0Ah
3Ah
TXD
(e.g.)
Playback
VCR operation commands
These commands are used to operate the VCR. When the command is
received correctly, the VCR returns ACK (OAh) and enters the mode
corresponding to the command.
Commands
Description
3A
PLAY
Play
3B
FWD X2
2x play
3C
FWD X0.2
0.2x play
3D
F-STILL
Pause
3E
FWD X10
10x play
3F
STOP
Stop
4A
REV X1
Reverse play
4B
REV X2
2x reverse play
4C
REV X0.2
0.2x reverse play
4D
R-STILL
Pause
4E
REV X10
10x reverse play
4F
STILL
Pause
58
GOTO IN
Cues up the point specified with the IN ENTRY (50) and IN DATA PRESET (E3).
When the tape is cued, COMPLETE (01) is returned. When the specified point
cannot be found, NOT TARGET (05) is returned.
59
GOTO OUT
Cues up the point specified with the OUT ENTRY (51) and OUT DATA PRESET (E4).
When the tape is cued, COMPLETE (01) is returned. When the specified point
cannot be found, NOT TARGET (05) is returned.
5B
MEMORY SEARCH
Cues up the point specified with the MEMORY (5A). When the tape is cued,
COMPLETE (01) is returned. When the specified point cannot be found, NOT
TARGET (05) is returned.
7B
OPERATE ON
Operating mode ON
7C
OPERATE OFF
Operating mode OFF
A0
STANDBY ON
Standby ON
A1
STANDBY OFF
Standby OFF
A2
PREROLL
Preroll
A3
EJECT
Eject cassette
AB
FF
Fast-forward. When this command is transmitted during playback, playback speed
changes to 10x.
AC
REW
Rewind. When this command is transmitted during playback, reverse playback starts
at 10x.
AD
F-FIELD STEP
Advances one frame. This command should be transmitted in the Play-Pause mode.
AE
R-FIELD STEP
Reverses one frame. This command should be transmitted in the Play-Pause mode.
B2
CUE UP WITH DATA
Use this command to cue up a specified point on the tape. When the tape is cued,
COMPLETION is returned and the Pause mode is engaged.
To specify the cue point, transmit the time data (hour: minute: second: frame, a total
of 8 bytes with 2 bytes for each) following this command.
B3
CUE UP AND PLAY
Use this command to cue up a specified point on the tape.
WITH DATA
When the tape is cued, COMPLETE is returned and the Play mode is engaged.
To specify the cue point, transmit the time data (hour: minute: second: frame, a total
of 8 bytes with 2 bytes for each) following this command.
Preparation
To control the VCR via the RS-232C interface, set the No.
050 <REMOTE SELECT> menu switch to “RS232C”, “IEEE
1394 + RS232C”, “JVC BUS + RS232C” or “JVC BUS +
1394”.
