Epson TM-T100 Technical Reference Manual page 70

Functions of each connector pin
Pin Signal Signal
no. name direction
1 FG -
2 RXD Input
3 TXD Output
4 DTR Output
5 SG -
6 DSR Input
7 RTS Output
Frame ground
Reception data
Transmission data
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. Select the BUSY condition in the software
setting mode.
2) When XON/XOFF control is selected, this signal indicates that 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.
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.
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. Select the BUSY condition in the software
setting mode.
2) When XON/XOFF control is selected, this signal indicates that 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.
Function
Appendix
70