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STAR Line Mode Command Specifications
1-1
1. INTERFACE CONFIGURATION
1.1. RS-232 Serial Interface
1.1.1. Specifications
(Conforming to RS-232)
Rating:
RS-232C
Synch method:
Start-Stop synchronization method
Handshake: DTR
mode
Baud rates:
4800, 9600, 19200, 38400 bps (Set by DIP switches)
Bit length:
7, 8 bits (Set by DIP switches)
Parity:
Yes/No (Set by DIP switches)
Parity bit:
Odd/even (Set by DIP switches)
Stop bit:
1 bit (Fixed)
Signal polarity:
Mark = logic 1 (-3 to -15 V)
Space = logic 0 (+3 to +15 V)
1.1.2.
Signal array and explanations according to interface connector pin
<Signal Array and Functions>
Pin
No.
Signal Name
Signal
Direction
Remarks
1 FG
-
Frame
ground
2 TXD OUT
Transmission
data
3 RXD
IN
Reception
data
4
RTS
OUT
Same as DTR
5 N.C
- Not
used
6 DSR
IN
Not
used
7 SG
-
Signal
ground
8-19 N.C
- Not
used
20
DTR
OUT
Data terminal ready signal (SPACE: printer is ready to receive.)
1) When in DTR mode:
When printer is ready to receive data: SPACE
2) When in XON/XOFF mode:
Always SPACE except in the following conditions.
1. Until communication is possible after a reset.
2. When test printing
21-24 N.C
Signal
ground
25 /INIT
IN Signal
ground