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12-2 RS-232C specifications

9PIN D-Sub

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Pin NO. Signals Operations Direction of
signals
2RXD Receive data VTR p PC
3TXD Transmit data VTR [ PC
4DTR Data terminal ready VTR [ PC
5GND Signal ground
6DSR 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.
0123456789ABCDEF
0SP0Pp
11AQaq
22BRbr
33CScs
44DTdt
55EUeu
66FVfv
77GWgw
88HXhx
99IYiy
AJZjz
BKk
CLl
DMm
ENn
FOo
D6 D7
D4 D5
D2 D3
D0 D1
Start bit Stop bit
12 RS-232C INTERFACE
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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 +
RS232C + 1394”.