Epson TM-T88 Series User Manual

101
Appendix
Functions of interface connector pins
Pin no.
Signal
name
Signal
direction
Function
1FG- Frame ground
2 TXD Output Transmission data
3 RXD Input Reception data
4 RTS Output Equivalent to DTR signal (pin 20)
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 SG - Signal ground
20 DTR 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. The BUSY condition can be specified
using memory switch 1-3.
2) When XON/XOFF control is selected, this signal indicates whether the
printer is properly connected and ready to receive data from the
host.
•SPACE status
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.
While the self-test is in progress.
25 INIT Input The printer can use this signal as a reset signal.
The printer is reset if the signal remains at SPACE for a pulse width of 1
ms or more.

Epson TM-T88 Series Specifications

General

Print Method	Thermal line printing
Interfaces	USB, Serial, Ethernet
Auto Cutter	Yes
Paper Width	80 mm / 58 mm (with paper width guide)
Power Supply	Internal (some models may use external)