Optional Serial Interface Pins And Signal Names - Star Micronics SCP700 Series Programmer's Manual

20

Optional serial interface pins and signal names

13
25
Pin Signal
Direction
No. Name
1 FG —
2 TXD OUT
3 RXD IN
4 RTS OUT
6 DSR IN
7 SG —
20 DTR OUT
25 INIT IN
Frame Ground
Transmission data
Receive data
Data terminal ready signal. This signal changes to SPACE when the printer is ready to
receive data.
Signal line that indicates if the host computer can receive data.
SPACE: host can receive
MARK: host cannot receive
The status of this signal is not confirmed.
This signal can be specified as an internal reset signal using of DIP Switch 7 (page 19).
MARK of 1ms or longer activates the reset.
Signal ground
Same as RTS (Pin 4).
This signal can be specified as an internal reset signal using of DIP Switch 8 (page 19).
SPACE of 1ms or longer activates the reset.
Function
1
14