Epson TM-T70II Technical Reference Manual page 95

Pin no. Signal name
3 RXD
4 RTS
6 DSR
7 SG
20 DTR
25 INT
XON/XOFF
When XON/XOFF control is selected, the printer transmits the XON or XOFF signals as follows. The
transmission timing of XON/XOFF differs, depending on the setting of memory switch 1-3.
Signal direction
Input Reception data
Output Equivalent to DTR signal (pin 20)
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.
— Signal ground
Output 1) 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. Set BUSY conditions with
memory switch 1-3.
2) When XON/XOFF control is selected, the signal indicates
that the printer is properly connected and ready to receive
data from the host. The signal is always SPACE, 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.
Input This signal can be used as a reset signal for the printer. The
printer is reset if the signal remains at SPACE for a pulse width
of 1 ms or more.
Function
Appendix
95