Appendix D: Serial Interface; D-1. Rs-232C Connector - Star Micronics TSP800 Series User Manual

D-1. RS-232C Connector

Pin No.
Signal name Direction
25 Pin 9 Pin
1 F-GND
2 3 TXD
3 2 RXD
4 7 RTS
5 N/C
8 CTS
6 6 DSR
7 5 S-GND
8~19 1,9 N/C
20 4 DTR
21~24 N/C
25 INIT
13
25
5
9

Appendix D: Serial Interface

— Frame ground
OUT Transmission data
IN Receive data
OUT Request To Send: The printer sets this signal to "SPACE" when it
is ready to send.
Not used
IN Status of this signal is not checked.
IN Status of this signal is not checked.
— Signal ground
Not used
Indicates whether data receive from host is enabled or disabled.
OUT
DTR/DSR Communication Mode
Space when receive is enabled.
X-On/X-Off Communication Mode
Always space, except during following conditions:
• Period between reset and communication enabled
• During self-test printing
Not used
IN Not used
1
6
– 123 –
Function
1
D-Sub 25 pin
14
D-Sub 9 pin