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6. SERIAL INTERFACE
6.1 Specifications
(1) Data transfer system Asynchronous, half duplex
(2) Baud rates
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps (Selectable by command)
(3) Serial data configuration
Start bit: 1 bit
Data bit: 8 bits Fixed
Parity bit: No parity
Stop bit: 1 bit
(4) Signal polarity
RS-232C
• Mark = logic “1” (–3V ~ –12V)
• Space = logic “0” (+3V ~ +12V)
(5) Receiving data (RD signal)
RS-232C
• Mark = logic “1” (–3V ~ –12V)
• Space = logic “0” (+3V ~ +12V)
(6) Transmission control (TD signal)
DC1 code (11H) X-ON: Data reception is available
DC3 code (13H) X-OFF: Data reception is not available
6.2. Connector Pin Configuration
Pin No. Signal Direction Function Pin No. of Cable
3 TXD Output Transferred data No. 2 pin of D-Sub 9 pins
6 +5V — No connection
7 RXD Input Received data No. 3 pin of D-Sub 9 pin
11 RTS Input Auto Turn On No. 7 pin of D-Sub 9 pin
14 — — No. 5 pin of D-Sub 9 pin
15 GND — No. 5 pin of D-Sub 9 pin
Connector
Printer side: Connector used on StarTac (Motorola)
PC side 9 pin D-SUB
Cable
Communication mode setting
(InfraRed or Serial)
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