Product Descriptions

Table 1-22 shows the connector pin assignment and signals for forward channel of the parallel interface.

Table 1-22. Connector Pin Assignments and Signals (Forward Channel)

Pin No.

Signal Name

Return

I/O

 

Description

GND Pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

/STROBE

19

I

The strobe pulse. Read-in of data is

performed at the falling edge of this pulse.

 

 

 

 

 

 

 

 

The data

0 to data 7 signals represent

2-9

DATA 0-9

20-27

I

data bits 0 to 7, respectively. Each signal

is at a HIGH level when data is logical 1

 

 

 

 

 

 

 

 

and a LOW level when data is logical 0.

10

/ACKNLG

28

O

This signal is a negative pulse indicating

that the printer can again accept data.

 

 

 

 

11

BUSY

29

O

When this signal is at a HIGH level, the

printer is not ready to accept data.

 

 

 

 

12

PE

28

O

When this signal is at a HIGH level, the

paper empty status is detected.

 

 

 

 

13

SLCT

28

O

Always at a HIGH level when the printer is

powered on.

 

 

 

 

14

/AFXT

30

I

Not used.

 

 

 

 

 

The falling edge of a negative pulse or a

31

/INIT

30

I

LOW signal on this line causes the printer

to initialize. Minimum 50 us pulse is

 

 

 

 

 

 

 

 

necessary.

 

32

/ERROR

29

O

When the

printer detects an error, this

signal goes LOW.

 

 

 

 

36

/SLIN

30

I

Not used.

 

18

Logic H

-

O

Pulled up to +5V via 3.9 K-ohm resistor.

35

+5V

-

O

Pulled up to +5V via 3.3 K-ohm resistor.

17

Chassis GND

-

-

Chassis ground.

16,33,19-30

GND

-

-

Signal ground.

15,34

NC

-

-

Not connected.

 

 

 

 

 

 

Note)

1.*/* at the beginning of a signal means active low.

2.The I/O column indicates the direction of the signal as viewed form the printer.

1-18

Rev. A