CBM-230/231User ’sManual
20 CITIZEN
7. SERIAL INTERFACE

7.1 Specifications

(1) Synchronizing system : A synchronous
(2) Baudrate
150, 300, 600, 1,200, 2,400, 4,800, 9,600, 19,200 bps (Selectedb y the user)
(3) Wordl ength
Startbit :1bit
Data bit : 7 bits or 8 bits (Selectedby the user)
Parity bit : Odd/even parity or noparit y (Selected by the user )
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) Receivedata (RDsignal)
RS-232C
•Mark = 1
•Space = 0
(6) Data receiving control (DTR signal)
RS-232C
•Mark : Data tr ansfer not possible
•Space : Data transfer possible
(7) Data transmis sion control (TD s ignal)
DC1 code(11H) X-ON :Data r eceptionpossible
DC3 code(13H) X-OFF : Data reception not possible