— 26 —
6. SERIAL INTERFACE

6.1 Specifications

(1) Synchronization: Asynchronous
(2) Baud rate
1200, 2400, 4800, 9600, 19200 Baud/sec (User selection)
(3) Word configuration
•Start bit: 1 bit
•Data bit: 7 bits or 8 bits (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 V to −12V)
•Space = Logic “0” (+3 V to +12 V)
Selecting presence or absence of signal is available with TTL (RESET) DIP switch
No. 3.
•H level = Logic “1”
•L level = Logic “0”
(5) Receive data (RD)
•Mark: “1”
•Space: “0”
(6) Transmit data (TD)
•Mark: “1”
•Space: “0”
(7) Received control data (DTR) (DTR signal)
•Mark: Data transmission not possible
•Space: Data transmission possible