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CBM-910 User’s Manual
CITIZEN 23/47
6. SERIAL INTERFACE
6.1 Specifications
(1) Synchronization : Asynchronous
(2) Baud rate : 1200, 2400, 4800, 9600 Baud/sec (User selection)
(3) Word configuration
• Start bit : 1 bit
• Data bit : 7 bit or 8 bit (User selection)
• Parity bit : odd, even, no parity (User selection)
• Stop bit : 1 bit or more
(4) Signal polarity
RS-232C
• Mark = Logic”1”(-3 to –12V)
• Space = Logic “0”(+3 to +12V)
TTL (RESET)
• H level = Logic”1”
• L level = Logic”0”
(5) Receive Data (RD)
• Mark : 1
• Space : 0
(7) Transmit Data (TD)
• Mark : 1
• Space : 0
(8) Received control (DTR signal)
• Mark : Data transmission not possible
• Space : Data transmission possible