Pin
Signal
Number
Name
Direction
*1
20
DTR
Output
25
RESET
Input
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.
Signal
This indicates whether the display is ready to receive data.
[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.
Reset signal is connected to the DTR terminal of the TM printer directly.
Function
*2
Appendix
89