Epson TM-m50II Technical Reference Guide - Page 113

Functions of each connector pin, Pin no., Signal name, Signal direction, Function

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Appendix Functions of each connector pin Pin no. Signal name Signal direction Function 2 RXD Input Reception data 3 TXD Output Transmission data 4 DTR Output When DTR/DSR control is selected, this signal indicates whether the printer is BUSY. • SPACE status Indicates that the printer is ready to receive data. • MARK status Indicates that the printer is BUSY. The conditions under which the printer becomes BUSY can be set using the Epson TM Utility or the TM-m50II Utility. 5 SG 6 DSR 7 RTS Input Output When XON/XOFF control is selected, the signal indicates that the printer is properly connected and ready to receive data from the host. The SPACE status indicates that the printer is connected properly and can receive data from the host. It is always in the SPACE status except in the following cases: • During the period from when power is turned on to when the printer is ready to receive data. • During the self-test. Signal ground This signal indicates whether the host computer can receive data. SPACE indicates that the host computer can receive data. MARK indicates that the host computer cannot receive data. When DTR/DSR control is selected, the printer transmits data after confirming this signal (except if transmitted using some ESC/POS commands). When XON/XOFF control is selected, the printer does not check this signal. Same as the DTR signal 113

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113
Appendix
Functions of each connector pin
Pin no.
Signal name
Signal direction
Function
2
RXD
Input
Reception data
3
TXD
Output
Transmission data
4
DTR
Output
When DTR/DSR control is selected, this signal indicates whether
the printer is BUSY.
•
SPACE status
Indicates that the printer is ready to receive data.
•
MARK status
Indicates that the printer is BUSY.
The conditions under which the printer becomes BUSY can be
set using the Epson TM Utility or the TM-m50II Utility.
When XON/XOFF control is selected, the signal indicates that the
printer is properly connected and ready to receive data from the
host.
The SPACE status indicates that the printer is connected properly
and can receive data from the host. It is always in the SPACE status
except in the following cases:
•
During the period from when power is turned on to when the
printer is ready to receive data.
•
During the self-test.
5
SG
-
Signal ground
6
DSR
Input
This signal indicates whether the host computer can receive data.
SPACE indicates that the host computer can receive data. MARK
indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after
confirming this signal (except if transmitted using some ESC/POS
commands).
When XON/XOFF control is selected, the printer does not check
this signal.
7
RTS
Output
Same as the DTR signal