
1-14 Features and General Specifications Rev. A
Interface connector terminal assignments and signal functions are described in the table
below.
TM-T88 series printer status and signals (continued)
Pin number Signal name Signal direction Function
1FG— Frame ground
2 TXD Output Transmit data
3 RXD Input Receive data
4 RTS Output Same as 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, and
MARK indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after
confirming this signal (except when transmitting data by DLE EOT,
and GS a).
When XON/XOFF control is selected, the printer does not check this
signal.
Changing the DIP switch setting enables this signal to be used as a
reset signal for the printer.
The printer is reset when the signal remains MARK for 1 ms or more.
7 SG — Signal ground
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