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iDP3420/3421/3423 User’s Manual
31 CITIZEN
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"(+3Vto+12V)
(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