TASCAM CD-A750 RS-232C Specification - Page 5

TASCAM CD-A750 RS-232C Protocol Specifications 3. Command format Command format overview Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 ... LF ID Command Data 1 Data 2 Data 3 Data 4 ... Byte n CR 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" Commands are composed by two ASCII bytes. The following bytes of the command are the data bytes. The number of data bytes depends on the command. For details on the data, refer to the detailed explanation for each command. For commands that use 0--9 and A--F as data values, uppercase characters are used for A--F. Example commands Example 1: PLAY command for the CD When the controlled device is in Stop or Ready mode, this command starts playback of the CD on the controlled device. The PLAY command is [12]. ID Command ASCII LF 0 1 2 CR HEX 0Ah 30h 31h 32h 0Dh Example 2: Direct search for track 123 on the CD Use "DIRECT TRACK SEARCH PRESET [23]" command. The data bytes consist of ASCII in two-byte units. For the "DIRECT TRACK SEARCH PRESET" command, the track number is specified as follows. Data 1 Tens digit of the specified track number Data 2 Ones digit of the specified track number Data 3 Thousands digit of the specified track number Data 4 Hundreds digit of the specified track number Thus, the transmitted command will be as follows. ID Command Data：track 123 ASCII LF 0 2 3 2 3 0 1 CR HEX 0Ah 30h 32h 33h 32h 33h 30h 31h 0Dh Example 3: FORWARD PLAY command for the Cassette When the controlled device is in Stop or Ready mode, this command starts playback of the cassette deck on the controlled device. The PLAY command is [12]. ID Command ASCII LF 1 1 1 CR HEX 0Ah 31h 31h 31h 0Dh 5 TEAC Corporation