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Tascam CD-A750 Specification
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Tascam CD-A750 Specification

Tascam CD-A750 Specification

Control i/o rs-232c connector rs-232c protocol specification
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TASCAM CD-A750
CONTROL I/O RS-232C connector
RS-232C Protocol Specification
Ver.1.00
May 2009
TEAC Corporation

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Summary of Contents for Tascam CD-A750

  • Page 1 TASCAM CD-A750 CONTROL I/O RS-232C connector RS-232C Protocol Specification Ver.1.00 May 2009 TEAC Corporation...
  • Page 2 1. This License Agreement with limited warranty shall apply to you when you start to use the protocol information. 2. TEAC grants to you the right to use the protocol information only to develop equipment which communicates control signals with CD-A750 through RS-232C port. The license granted hereby shall be non-exclusive, non-transferable.
  • Page 3 TASCAM CD-A750 RS-232C Protocol Specifications Overview The CD-A750 can be controlled by computer or external device via RS-232C connector on the rear panel with the RS-232C serial protocol. In this document, the CD-A750 is referred to as the "controlled device,"...
  • Page 4 TASCAM CD-A750 RS-232C Protocol Specifications Controlled device (CD-A750) External controller TEAC Corporation...
  • Page 5 Commands begin with a "line feed (LF)," end with a "carriage return (CR)". The following byte of “LF” is machine ID. In the case of CD-A750, “0” (30H) means CD and “1” (31H) means Cassette deck. The machine ID for common function is either “0” or “1”...
  • Page 6 TASCAM CD-A750 RS-232C Protocol Specifications List of commands CD Player section (Machine ID=”0”) Control/Preset/Sense Command Return Command TIME DATA STOP PLAY PLAY READY SHUTTLE EJECT TRACK SKIP CALL AUTO CUE LEVEL PRESET AUTO CUE LEVEL RETURN DIRECT TRACK SEARCH PRESET...
  • Page 7 TASCAM CD-A750 RS-232C Protocol Specifications Cassette Deck section (Machine ID = “1”) Control/Preset/Sense Command Return Command STOP FORWARD PLAY REVERSE PLAY RECORD F.FWD/REW REC MUTE PAUSE MECHA STATUS SENSE MECHA STATUS RETURN MEDIA STATUS SENSE MEDIA STATUS RETURN COUNTER SENSE...
  • Page 8 TASCAM CD-A750 RS-232C Protocol Specifications Command sequence In most cases the controlled device will not send an ACK in response to transport control or data preset commands sent from the external controller. The controlled device will send back a return command in response to data sense commands that request a data value specified on the controlled device.
  • Page 9 TASCAM CD-A750 RS-232C Protocol Specifications Example 4: Checking the status of the controlled device, and performing the next operation When the operating status of the controlled device changes, it will transmit CHANGED STATUS. By using CHANGED STATUS as a trigger for sending MECHA STATUS SENSE, the new operating status can be determined.
  • Page 10 A command is two character bytes, a machine ID is one character byte, and each item of data is an individual character byte. The CD-A750 can use the following track numbers. However if a number not existing on the disc is specified, it will be considered an invalid command.

  • Page 11: Track Skip

    TASCAM CD-A750 RS-232C Protocol Specifications Command Machine ID Data none Return none TRACK SKIP Causes the CD player of the controlled device to skip tracks. After skipping, the device will maintain the mode in which it was when the operation began.
  • Page 12 TASCAM CD-A750 RS-232C Protocol Specifications Data 2 Ones digit of the track number Example) 2301: track 123 Data 3 Thousands digit of the track number Data 4 Hundreds digit of the track number ・ If the specified track number does not exist on the disc, the controlled device will transmit ILLEGAL [F2].
  • Page 13 TASCAM CD-A750 RS-232C Protocol Specifications Data 2 bytes Data 1 Data 2 Description Remarks EOM Track Off 5 seconds 10 seconds 15 seconds 20 seconds 25seconds 30 seconds 35seconds Sense Requests that the preset content be returned. ・ If data outside the range specified above is received, the controlled device will transmit ILLEGAL[F2].
  • Page 14 TASCAM CD-A750 RS-232C Protocol Specifications REPEAT SELECT Specifies the Repeat Mode setting of the CD player of the controlled device. A return command is returned only if Sense [FF] is specified. Command Machine ID Data 2 bytes Data 1 Data 2...
  • Page 15 TASCAM CD-A750 RS-232C Protocol Specifications Total remain time send Without frame data Sense Requests that the preset content be returned. ・ If data other than the above is received, the controlled device will transmit ILLEGAL [F2]. ・ Except for the CD-DA disc, only [11] Elapsed time send is available...
  • Page 16 TASCAM CD-A750 RS-232C Protocol Specifications TEXT SENSE Requests that the title of the current track be returned. Command Machine ID Data 2 bytes Data 1 Data 2 Description Remarks ・ If a track number not existing on the disc is specified, the controlled device will transmit ILLEGAL [F2].
  • Page 17 TASCAM CD-A750 RS-232C Protocol Specifications –36dB –42dB –48dB Request/Preset AUTO CUE LEVEL PRESET [20] AUTO CUE SELECT RETURN This is the return command in response to the command "AUTO CUE SELECT [30]". It returns the Auto Cue on/off status. Command...
  • Page 18 TASCAM CD-A750 RS-232C Protocol Specifications AUTO READY SELECT RETURN This is the return command for the command "AUTO READY SELECT [36]". It returns the Auto Ready on/off status. Command Machine ID Data 2 bytes Data 1 Data 2 Description Remarks...
  • Page 19 TASCAM CD-A750 RS-232C Protocol Specifications Remain Time Send With Frame data Total Remain Time Send With Frame data Elapsed Time Send Without Frame data Remain Time Send Without Frame data Total Remain Time Send Without Frame data Request/Preset TIME DATA SEND SELECT [3F] PLAY MODE RETURN This is the return command for the command "PLAY MODE SENSE [4E]".
  • Page 20 TASCAM CD-A750 RS-232C Protocol Specifications MEDIA STATUS RETURN This is the return command for the command "MEDIA STATUS SENSE [56]". It returns the presence/absence of a disc, and the type of disc. Command Machine ID Data 4 bytes Data 1...
  • Page 21 TASCAM CD-A750 RS-232C Protocol Specifications Data 10 Ones digit of the frames Request/Preset CURRENT TRACK TIME SENSE [58] TITLE RETURN This is the return command for the command "TITLE SENSE [59]". It returns the title of the track. If no title has been written for the specified track or the title data is other than ASCII format, this returns the command "ILLEGAL SENSE REQUEST [F2]."...

  • Page 22: Reverse Play

    TASCAM CD-A750 RS-232C Protocol Specifications Data 5 Tens digit of the minutes Data 6 Ones digit of the minutes Data 7 Thousands digit of the minutes Data 8 Hundreds digit of the minutes Data 9 Tens digit of the seconds...
  • Page 23 TASCAM CD-A750 RS-232C Protocol Specifications REC MUTE Executes the REC MUTE on cassette deck of the controlled device. Command Machine ID Data none Return none PAUSE Puts the cassette deck of the controlled device in PAUSE mode. Command Machine ID...

  • Page 24: Information Request

    TASCAM CD-A750 RS-232C Protocol Specifications Machine ID Data 4 bytes Data 1 Data 2 Description Remarks Stop Play Record Record-Pause F.FWD/REW Pause Data 3 Data 4 Description Remarks No direction Forward direction Reverse direction Request/Preset MECHA STATUS SENSE [50] MEDIA STATUS RETURN This is the return command for the command "MEDIA STATUS SENSE [56]".
  • Page 25 TASCAM CD-A750 RS-232C Protocol Specifications REMOTE/LOCAL SELECT Enables or disables key operations on the controlled device's own panel. A return command is returned only if Sense [FF] is specified. Command Machine ID 0 or 1 Data 2 bytes Data 1...
  • Page 26 TASCAM CD-A750 RS-232C Protocol Specifications ERROR SENSE REQUEST This is transmitted when the controlled device is in an error condition. If this command is transmitted from the controlled device, the external controller device should transmit the command "ERROR SENSE [78]" to determine the content of the error.
  • Page 27 TASCAM CD-A750 RS-232C Protocol Specifications 2–01 The cassette mechanism is broken Request/Preset ERROR SENSE [78] TEAC Corporation...