50
Appendix
Interfaces
Serial Interface
7
Specifications
No.
Name
I/O
Pin explanation
1
CTS
IN
XON/OFF: not used
DTR/DSR:
not used
2
RTS
OUT
Pull up to + 10V through 3.3 k
Ω
3
RXD
IN
Data beam from the host to the printer
4
SGND
–
GND of the signal line
5
TXD
OUT
XON/OFF : Data beam from printer to host
Transmits XON/XOFF
DTR/DSR : Not used
6
DTR
OUT
XON/OFF : Always High
DTR/DSR : High when the printer can receive
Low when it cannot receive
7
IFSEL
Cable judgement when the optional RS232C cable is connected to
the printer
8
DSR
IN
XON/OFF : Not used
DTR/DSR : High when the host can receive
Low when it cannot receive
7
Pin layout
* IN: signal from host to printer, OUT: signal from the printer to host
Transmission method
Two way serial communication
Signal level
RS-232C
Baud rate
600/1,200/2,400/4,800/9,600/
19,200/38,400/57,600/11,500 bps
Data length
7 or 8 bit
Start bit
1 bit
Stop bit
1 bit, 2 bits
Parity
Even, odd, none
Connector
MD-S8100-10 (JST)
