Appendix A System Interface Description
A-2
1. Serial Interface RS-232C
1.1
Interface Characteristics
Signal Description RS-232C
Pin No.
Direction
PG
Protective Ground
1
-
TXD
Transmit Data (from printer to host)
2
OUTPUT
RXD
Receive Data (from host to printer)
3
INPUT
RTS
Request to Send (printer is requesting data transfer from host)
4
OUTPUT
CTS
Clear to Send (host is ready to receive data from printer)
5
INPUT
DSR
Data Set Ready (host is requesting data transfer from printer,
6
INPUT
can not be used for flow control, internaly set to "1")
SG
Signal Ground
7
-
DTR
Data Terminal Ready (printer is ready to receive - see also on the
20
OUTPUT
following pages the data communication protocols for detail meaning
S
Transmission rate:
600, 1200, 2400, 4800, 9600, or 19200 baud
S
Parity:
even, odd, none, or ignore
S
Word length:
7, or 8 bits
S
Number of stop bits: In receive mode the printer accepts 1, or 2 stop bits. The
printer transmits always two bits.
Transmission Protocols:
S
DTR - Ready/Busy (only RS-232C)
S
XON/XOFF
S
XON/XOFF + DTR
Содержание CI-4070
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