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. 101 Pin Number Signal Name Signal Direction Function 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 o r 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 o r 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.