Interface; Specifications; The Communication Flow - Epson P07303 User Manual

4. Interface

4.1 Specifications

Data transmission:
Synchronization:
Handshaking:
Signal level:
Baud rates:
Parity:
Bit length:
Stop bits:

4.2 The communication flow

Data flow :
Handshaking flow :
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.
Serial
Asynchronous
DTR / DSR
MARK = -3 to –15 V (logic "1")
SPACE = +3 to +15 V (logic "0")
4800,9600,19200,38400 bps
None, even
8 bits
1 or more
PC/host to display, Display to printer, Printer to
PC/host
Display to PC/host, printer to display,
PC/host to printer
Customer
display
Host
computer
Control connecting direction
Data connecting direction
Receipt
printer
4