Appendix D: Interface; Pins And Signal Names - Star SP298 SERIES User Manual

Appendix D: Interface

This appendix provides detailed specifications for the printer's standard serial
interface.
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Pins and Signal Names

Pin Signal
Direction
No. Name
1 FG —
2 TXD OUT
3 RXD IN
4 RTS OUT
5 N.C.
6 DSR IN
Frame ground
Transmission data
Receive data
STAR Mode
When Memory Switch 4-D = 0: Same as DTR signal
When Memory Switch 4-D = 1: Always SPACE
ESC/POS Mode
Same as DTR signal
Not connected
• DIP Switch 9 = OFF
STAR Mode
Status of this signal is not checked.
ESC/POS Mode
In DTR/DSR communication mode when Memory Switch4-5 = 0, indicates whether data
receive from host is enabled or disabled.
Space: Receive enabled
Mark: Receive disabled
This signal is not checked in the X-ON/X-OFF communication mode.
• DIP Switch 9 = ON
This signal used for external reset. Printer is reset whenever signal is in mark state with
pulse width of 1mS or more.
Function
106
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