Serial interface – Citizen Systems iDP-3550 User Manual
Page 42
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10. SERIAL INTERFACE
10.1
Specifications
(1) Synchronous system: Asynchronous
(2) Baud rate: 150, 300, 600, 1200, 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 (RXD signal)
RS-232C
• Mark
= 1
• Space
= 0
(6) Reception control (DTR signal)
RS-232C
•Mark
: Data transfer disabled
•Space
: Data transfer enabled
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