Chapter5 Appendixes

Interface

Serial (RS232C) interface

￿Pin assignment

PIN No.

Signal Name

Direction

Function

1

GF

–

Frame ground

2

TXD

Output

Data transmission

3

RXD

Input

Data reception

4

RTS

Output

Same as DTR (20pin)

6

DSR

Input

Host reception enabled status HIGH-READY/LOW-NOT READY

 

 

 

 

[During DTR/RTS control]

 

 

 

 

The printer transmits data after it is confirmed that DSR is high.

 

 

 

 

(But transmission by DLE EOT, GS a)

 

 

 

 

[During XON/XOFF control]

 

 

 

 

Printer does not confirm DSR.

7

SG

–

Signal ground

20

DTR

Output

Printer READY/BUSY status HIGH-READY/LOW-BUSY

 

 

 

 

[During DTR/RTS control]

 

 

 

 

When the printer is in reception enabled status, it is READY, when it is

 

 

 

 

reception disabled, it is BUSY.

 

 

 

 

 

 

 

 

 

Printer status

 

 

 

 

1)

BUSY until completion of initial settings when the power is turned on

 

 

 

 

2)

BUSY in normal OFFLINE status

 

 

 

 

3)

BUSY in OFFLINE status during PE

 

 

 

 

4)

BUSY in OFFLINE status when other errors occur

 

 

 

 

 

 

 

 

 

 

5)

BUSY when the reception buffer is full

 

 

 

 

6)

BUSY during Self-Print

 

 

 

 

 

 

 

 

 

[During XON/XOFF control]

 

 

 

 

Always HIGH-READY except under the following conditions

 

 

 

 

1)

Until completion of initial settings when the power is turned on

 

 

 

 

2)

During Self-Print

25

INIT

Input

Printer RESET (1ms or more is higher)

￿ Buffer Full Control

 

 

 

 

 

￿ Connection with HOST

 

 

 

 

 

Reception buffer 40/4K

 

 

Printer

 

Host

 

 

 

 

 

 

 

 

 

 

 

1

FG

 

1

FG

 

 

 

 

 

 

 

 

 

 

 

2

TXD

 

2

TXD

 

 

 

 

 

 

 

 

 

 

 

3

RXD

 

3

RXD

 

 

 

 

 

 

 

 

 

 

 

4

RTS

 

4

RTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8/1536 bytes

16/512 bytes

 

 

 

 

5

CTS

 

6

DSR

 

6

DSR

 

 

XON

XOFF

 

 

 

 

 

7

SG

 

7

SG

Overrun/Buffer size: 16/512 bytes

 

 

 

20

DTR

 

20

DTR

XOFF cancel size: 8/1536 bytes

 

 

 

 

 

 

 

 

48