Serial Interface; Specifications - Citizen CBM-1000 User Manual

7. SERIAL INTERFACE

7.1 Specifications

(1) Synchronizing system
Asynchronous
(2) Baud rate
2400, 4800, 9600, or 19200 bps (User selectable)
(3) Configuration of one word
Start bit: 1-bit
Data bits: 7 or 8-bits (User selectable)
Parity bit: Odd, even, or none (User selectable)
Stop bit: 1-bit or more
(4) Signal polarity
RS-232C
• Mark = Logic "1" (–3 V to –12 V)
• Space = Logic "0" (+3 V to +12 V)
(5) Received data (RD signal)
RS-232C
• Mark = 1
• Space = 0
(6) Reception control (DTR signal)
RS-232C
• Mark: Data transfer disabled
• Space: Data transfer enabled
(7) Transmission control (TD signal)
DC1 code (11H)X-ON: Data reception enabled
DC3 code (13H)X-OFF: Data reception disabled
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