TASCAM CD-A750 RS-232C Protocol Specifications
5
TEAC
Corporation
3.
Command format
Command format overview
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
…
Byte n
LF
ID
Command
Data 1
Data 2
Data 3
Data 4
…
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