11 RS-232C INTERFACE

 

 

 

 

 

11-2

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D0

D1

D2

 

D3

D4

D5

 

D6

D7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start bit

 

 

 

 

 

 

 

 

 

Stop bit

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

 

 

 

 

11 RS-232C INTERFACE

 

 

 

 

 

11-3 RS-232C commands

 

 

 

 

An optional RS-232C interface can be installed in this unit

Preparation

 

 

 

and connected to a personal computer. Data transmitted and

To control the VCR via the RS-232C interface, set the No.

received via the RS-232C interface enables the PC to control

050 <REMOTE SELECT> menu switch to “RS232C”, “IEEE

the VCR and gather status and operating information.

1394 + RS232C”, “JVC BUS + RS232C” or “JVC BUS +

 

 

 

VCR operation commands

 

RS232C + 1394”.

 

 

 

 

 

 

 

 

These commands are used to operate the VCR. When the command is

(e.g.)

TXD

3Ah

received correctly, the VCR returns ACK (OAh) and enters the mode

corresponding to the command.

 

 

Playback

RXD

0Ah

 

 

 

 

 

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

 

 

 

 

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, COMPLETION 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.

 

 

B5

F-SHUTTLE

Shuttle play. The search speed is specified by sending the speed code data after this

 

 

command (see the table below).

 

 

 

 

 

Speed code table (corresponding speed)

 

 

 

 

 

Speed code

Search speed

 

 

 

 

 

30h

Still

 

 

 

 

 

31h

0.1

 

 

 

 

 

33h

0.2

 

 

 

 

 

34h

0.3

 

 

 

 

 

35h

1

 

 

 

 

 

36h

2

 

 

 

 

 

37h

5

 

 

 

 

 

38h

10

 

 

 

32

33

Page 18
Image 18
JVC BR-DV600E manual 11-2 RS-232C specifications, 11-3 RS-232C commands