CBM-710/720/730/750User ’sMa nual
25 CITIZEN
9. SERIAL INTERFACE

9.1 Specifications

a) Synchronism : Asynchronous
b) Baudrate:
RS-232Ctype : 110, 150, 300, 600, 1200, 2400, 4800, 9600BPS(Selected by user)
CurrentLoop type : 110, 150, 300, 600, 1200BPS(Selected by user)
c) Compositionof one word:
Start bit : 1bit
Data bit : 7 or 8bits (selected by user)
Parity bit : Odd, even or no parity (Selected b y user)
Stopbit : 1bitor more
d) SignalPolarity :
RS-232Ctype : *Mark = Logic"1" (-3Vto -12V)
*Space =Logic"0" (+3Vto +12V)
Current Loop type : *Mark = Logic "1" ( Current ON)
*Space =Logic " 0" (Current OFF)
e) Received Data:
RS-232C& Current Loop (RD signal)
*Mark = 1
*Space = 0
f) Receiving Control (DTR signal)
RS-232C : *Mark: DataTransfer not possible
*Space: Data Transfer possib le
Current Loop: *Mark (Current ON) : Data Transfer possible
*Space (Current OFF) : DataTransfe r not possible
g) Transmission Contr ol (TD signal )
DC1 code (11H) "X" O N : Data Receiving possible
DC3 code (13H) "X" O FF: Data Receiving not possible
However, this is validonly for type B input buffer(7K) .