11 RS-232C Interface, Contents of Status Sense

11 RS-232C INTERFACE

Contents of STATUS SENSE

When the STATUS SENSE (D7H) command is sent, the

following data (5 bytes) is returned.

Fourth byte
Bit No.	Status	When the bit is 1
7	PLAY MODE	The VCR is playing back a tape.
6	FF MODE	The VCR is fast-forwarding a

11 RS-232C INTERFACE

Contents of JVC STATUS SENSE

When the STATUS SENSE (DDH) command is sent, the following data (4 bytes) is returned.

Error-related commands

This command is returned when transmitted data cannot be received normally by the VCR. A command to release the error status is also available.

First byte
Bit No. Status	When the bit is 1

7Always 1

6Always 0

5	SHORT FF/REW	During short FF or short REW
4	REC INHIBIT	Recording is inhibited.
3	CASSETTE OUT	There is no cassette loaded.
2	SERVO LOCK	Servo is locked.
1	Undefined	Always 0
0	ERROR	An error has occurred.
Second byte
Bit No.	Status	When the bit is 1
7	VIDEO EE	Video output is EE.
6	AUD 1 EE	Audio 1 output is EE.
5	VIDEO MUTE	Always 0
4	AUD 1 MUTE	Always 0
3	WARNING	There is a problem with the VCR.
2	DEW	Condensation has formed in
		the VCR.
1	TAPE BEGIN	Short FF at the tape beginning
0	TAPE END	Short REW at the tape end
Third byte
Bit No. Status		When the bit is 1
7	TIMER PLAY	The [TIMER] switch is set to
		“PLAY”.
6	TIMER REC	The [TIMER] switch is set to
		“REC”.
5	Unused	Always 0
4	Unused	Always 0
3	Unused	Always 0
2	Unused	Always 0
1	SEARCH MODE	The VCR is in the Search mode
0	Unused	Always 0

			tape.
5	REW MODE		The VCR is rewinding a tape.
4	STOP MODE		The VCR is in the Stop mode.
3	STANDBY MODE		The VCR is on standby.
2	EJECT		A cassette is being ejected.
1	REC MODE		The VCR is recording on a tape
0	Unused		Unused
Fifth byte
Bit No.	Status		When the bit is 1
7	PAUSE MODE		The VCR temporarily stops.
6	Unused		Always 0
5	SHUTTLE FWD		The VCR is shuttle-searching
			in the forward direction.
4	SHUTTLE REV		The VCR is shuttle-searching
			in the reverse direction.
3	SPEED CODE 3		Speed code 3
2	SPEED CODE 2		Speed code 2
1	SPEED CODE 1		Speed code 1
0	SPEED CODE 0		Speed code 0
Search speed table (corresponding speed only)
Search speed			Speed code (bit No.)
		3	2	1	0
STILL		0	0	0	0
0.1		0	0	1	0
0.2		0	0	1	1
0.3		0	1	0	0
1		0	1	0	1
2		0	1	1	0
5		0	1	1	1
10		1	0	0	1

First byte

Bit No. Status

7Always 1

6Always 0

5	Unused
4	DMF
3	Unused

2JVC TABLE 2

1JVC TABLE 1

0LOCAL

Second byte

Bit No. Status

7TC GENERATOR

6USERS BIT

5TIME CODE

4CTL PULSE

3	CTL
	interpolation
2	DROP FRAME
1	LTC
0	Unused
Third byte
Bit No. Status

7TC REC RUN

6TC REGEN

5TC EXTERNAL

4TC INSERT LED

3AUD 2 INSERT LED

2AUD 1 INSERT LED

1VIDEO INSERT LED

0ASSEM LED

Fourth byte
Bit No. Status
7	TBC PWB IN
6	TC PWB IN
5	DA3 INSERT LED
4	DA4 INSERT LED
3	AUTO MODE
2	Unused
1	Unused
0	Unused

When the bit is 1

Always 0 Always 0 Always 0 JVC TABLE 2 is effective. JVC TABLE 1 is effective. The [REMOTE] switch is set to “LOCAL”.

When the bit is 1 The time code generator is in the TCG mode. The counter mode is set to the UB mode. The counter mode is set to the TC mode. The counter mode is set to the CTL mode. Always 0

The current time code is set to the Drop Frame mode (U MODEL). Always 0 (E MODEL) Always 0

When the bit is 1 The TCG is set to the Rec Run mode. The TCG is set to the REGEN mode. Always 0 Always 0

Always 0

Assemble mode

When the bit is 1

Always 1

Always 0

Command Description

02ERROR: Returned when the VCR receives an invalid command after the second byte of the transmitted command. In this case, even though commands are sent continuously, no commands can be accepted except STATUS SENSE. To release this error mode, send the following commands.

41CLEAR ERROR: Clears the last transmitted byte. Use this to release the error mode as well.

56CLEAR: All commands are canceled. This is also used to release the error mode.

0B	NAK: Returned when the VCR receives an
	undefined command for the first byte or a
	command specifying a function not
	available on the VCR. Releasing the error
	mode with the CLEAR command is not
	necessary. Just send a correct command.

*Usage example of CLEAR ERROR Specify the cue-up point at 1:10:10:25.

As this data cannot be specified for the data following the

CUE UP WITH DATA, correct the data.

Mis-input

TxD

RxD

CLEAR ERROR