User`s manual

CBM-292/293 User’s Manual
34 CITIZEN
8. SERIAL INTERFACE
8.1 Specifications
(1) Synchronizing system : Asynchronous
(2) Baud rate : 1,200, 2,400, 4,800, 9,600, or 19,200 bps (User selectable)
(3) Configuration of one word
Start bits : 1 bit
Data bits : 8 bits
Parity bits : Odd, even, or no parity (User selectable)
Stop bits : 1 bit or more
(4) Signal polarity
RS-232C
•
Mark = Logic "1"(
−
3
∼ −
12 V)
•
Space = Logic "0"(+3
∼
+12 V)
(5) Received data (RXD signal)
RS-232C
•
Mark = 1
•
Space = 0
(6) Reception control (DTR signal)
•
Mark : Data transfer disabled (BUSY)
•
Space : Data transfer enabled
(7) Transmitted data (TXD signal)
•
Mark = 1
•
Space = 0
(8) Transmission control (DSR signal)
•
Mark : TXD data transmission disabled
•
Space : TXD data transmission enabled
(9) Transmission control (TXD signal: X-ON/X-OFF control)
•
DC1 code(11H) X-ON : Data reception enabled
•
DC3 code(13H) X-OFF : Data reception disabled