Epson DM-D110 Series, Technical Reference Manual

Page: 89 / 110

89
Appendix

1 Make sure to use either the RTS or the DTR terminal. Otherwise, the built-in RS-232 driver IC may be broken.

2 This signal is connected to the DTR terminal of the TM printer directly.
20
*1
DTR Output This indicates whether the display is ready to receive data.
*2

[SPACE]: The display can receive data.

DTR goes to SPACE under the following conditions:

When the display first becomes ready to receive data after power on.

When the self-test has ended.

When the remaining space in the receive buffer becomes 50 bytes or
more after having been 40 bytes or less.

[MARK]: The display cannot receive data.

DTR goes to MARK under the following conditions:

The period from when power is turned on to when the display first
becomes ready to receive data.

When the self-test is executed.

When the remaining space in the receive buffer becomes 128 bytes or
less (buffer-full state).

When DSR MARK is on, if the TM printer is selected by a peripheral device
command.
25 RESET Input Reset signal is connected to the DTR terminal of the TM printer directly.
Pin
Number
Signal
Name
Signal
Direction
Function