Appendix D: Serial Interface (RS-232C)

Appendix D: Serial Interface (RS-232C)

D-1. RS-232C Connector

Pin No.

Signal name

Direction

Function

 

 

25 Pin

9 Pin

 

1

 

 

F-GND

Frame ground

 

 

 

 

 

 

2

3

 

TXD

OUT

Transmission data

 

 

 

 

 

 

3

2

 

RXD

IN

Receive data

4

7

 

RTS

OUT

Same as DTR signal.

 

 

 

 

 

 

5

 

 

N/C

 

Not used

 

 

 

 

 

 

 

8

 

CTS

IN

Status of this signal is not checked.

6

6

 

DSR

IN

STAR Mode

 

 

 

 

 

Status of this signal is not checked.

 

 

 

 

 

ESC/POS Mode

 

 

 

 

 

In DTR/DSR communication mode, indicates whether data receive

 

 

 

 

 

from host is enabled or disabled.

 

 

 

 

 

Space: Receive enabled

 

 

 

 

 

Mark: Receive disabled

 

 

 

 

 

(except when transmitting data by DLE EOT, and GS a)

 

 

 

 

 

This signal is not checked in the X-ON/X-OFF communication

 

 

 

 

 

mode.

 

 

 

 

 

 

7

5

 

S-GND

Signal ground

 

 

 

 

 

 

8~19

1,9

 

N/C

 

Not used

20

4

 

DTR

OUT

STAR Mode

 

 

 

 

 

Indicates whether data receive from host is enabled or disabled.

 

 

 

 

 

1) DTR/DSR Communication Mode

 

 

 

 

 

Space when receive is enabled.

 

 

 

 

 

2) X-On/X-Off Communication Mode

 

 

 

 

 

Always space, except during following conditions:

 

 

 

 

 

• Period between reset and communication enabled

 

 

 

 

 

• During self printing

 

 

 

 

 

ESC/POS Mode

 

 

 

 

 

Indicates whether data receive from host is enabled or disabled.

 

 

 

 

 

1) DTR/DSR Communication Mode

 

 

 

 

 

This signal indicates whether the printer is busy. SPACE

 

 

 

 

 

indicates that the printer is ready to receive data, and MARK

 

 

 

 

 

indicates that the printer is busy. The busy condition can be

 

 

 

 

 

changed by using DIP SW 1-6 as follows:

 

 

 

 

 

 

– 39 –

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Star Micronics TSP1000 user manual Appendix D Serial Interface RS-232C, D-1. RS-232C Connector