Tascam RS-232 Specification Sheet

RS-232 IMPLEMENTATION OVERVIEW
TASCAM's 322 cassette deck has a standard RS-
232C port, capable of receiving commands and
sending status information. Commands are
included for transport functions, including CPS
(Compumatic Program Search), Counter Reset,
and Sync Reverse settings. Tally information
will include deck status, timer information and
record prohibit status.
• Individual Control Over Each Deck
• Extensive Transport Control Command Set
(Includes CPS, RTZ, Sync Reverse and Dubbing)
• Transport Status Tallies
• Tape Counter Readout Information (MM:SS)
• Tape Counter Reset Command
• Tape Status (Record Prohibit/Enable)
• Empty Deck Indication
COMMAND STRUCTURE & BEHAVIOR
Basic Transport Commands:
LF 0 1 1
0Ah 30h 31h 31h 30h
PLAY, DECK 1, SIDE A
Preamble - All command strings for the 322 begin with an
identifying phrase of "Line Feed" (0Ah) and a "0" (30h).
Command - The command follows the preamble directly.
(For a complete list of all the commands, see Transport
Commands on the next page.)
Deck - This determines whether the command is targeted
at Deck 1 (30h 31h) or Deck 2 (30h 32h).
Direction - For commands which have directionality to it,
this determines whether the forward or reverse direction is
desired. Forward direction (30h 31h) and reverse direction
(30h 32h) are used for commands with direction. Transport
commands without direction use a "no direction" (30h 30h)
place holder.
Delimiter - All command strings for the 322 end with
"Carriage Return" (0Dh) as the delimiter.
7733 Telegraph Road
All features and specifications are subject to change without notice. Contact your local TASCAM representative for the latest information.
0 1 0 1 CR
31h 30h 31h 0Dh
• Montebello, CA 90640
RS-232 Pin Assignment & Protocol Specification:
Connector: DB9
Pin 2: Rx Data
Pin 3: Tx Data
Pin 5: Ground
Rx Data
Tx Data
Ground
322 RS-232 Port
Status Request Commands:
LF 0 5
0Ah 30h 35h 30h
SENSE MECHANISM STATUS, DECK 1
Status request commands will follow the same structure as
basic transport commands, except a direction is not
included in the command. (That information will be given
in the reply.)
The 322 does not automatically generate status commands
when mechanisms change, so the controller will need to
scan the 322 at some rate.
When setting a scanning cycle, it is important to recognize
that the 322 requires 20 milliseconds between commands.
Since there are 3 types of information per deck (time,
record prohibit, and mechanism status), it is easily possible
to scan each status every half second, and still only be
sending messages to the 322 every 83 milliseconds.
TASCAM USA has tested the 322, scanning each status type
every half second, and the 322 performed flawlessly.
• (323) 726-0303 • http://www.tascam.com
RS-232 Specification
Data Transmission Speed:
Command Spacing:
Character Length:
Parity Bit:
Stop Bit:
Tx Data
2
Rx Data
3
Ground
5
External Unit
0 0 1 CR
30h 31h 00h
322
9600 bps
>20msec
8 bit
None
1 bit
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