4
4. Interface
4.1 Specifications
Data transmission:
Serial
Synchronization: Asynchronous
Handshaking:
DTR / DSR
Signal level:
MARK = -3 to –15 V (logic “1”)
SPACE = +3 to +15 V (logic “0”)
Baud rates:
4800,9600,19200,38400 bps
Parity: None,
even
Bit length:
8 bits
Stop bits:
1 or more
4.2 The communication flow
Data flow :
PC/host to display, Display to printer, Printer to
PC/host
Handshaking flow :
Display to PC/host, printer to display,
PC/host to printer
Note:
There are 200 bytes resident buffer in the display for pass data to printer. If PC/host keep
transmitting the data to printer when the display inactive DTR or RTS , data will be lost.
Customer
display
Host
computer
Receipt
printer
Control connecting direction
Data connecting direction
Summary of Contents for P07303
Page 1: ...USER S MANUAL P07303 Stand Alone VFD Pole Display 48200550 January 2002 V1 0 ...
Page 27: ...23 3 8 Character Set 8 1 International Character Sets 8 2 USA Standard Character Sets 20H 7EH ...
Page 29: ...25 5 8 6 Page 3 PC860 Portuguese 80H FFH 8 7 Page 4 PC863 Canadian French 80H FFH ...
Page 30: ...26 6 8 8 Page 5 PC865 Nordic 80H FFH 8 9 Page 6 Slavonic 80H FFH ...
