Xerox 4213 User Manual

INTERFACES

Table 1-2 describes Centronics 100 signals and pin assignments. 

Table 1-2.

1

To printer

STROBE L

STROBE pulse low to read data.  A strobe
low signal raises BUSY line to high.

2

To printer

DATA BIT 1

1

3

To printer

DATA BIT 2

1

4

To printer

DATA BIT 3

1

5

To printer

DATA BIT 4

1

6

To printer

DATA BIT 5

1

7

To printer

DATA BIT 6

1

8

To printer

DATA BIT 7

1

9

To printer

DATA BIT 8

1

10

From printer

ACKNLG L

ACKNLG pulse low indicates data  was
received  and printer is ready to receive
more data. 

11

From printer

BUSY H

BUSY “high“ indicates the printer cannot
receive data, (buffer is full).  BUSY high
occurs when an error condition exists.

12

From printer

PE H

Ground

13

From printer

SLCT H

A high signal indicates the printer is in
the select state.
A low signal occurs when the printer is
deselected or if an error condition exists.

14

Ground (standard Centronics)

15

Printer to stunt
box

2 MHz Field stunt box clock.  The stunt
box is not provided by Xerox.

16

0 volts

Logic ground

1-4

XEROX 4213 LASER PRINTER PROGRAMMER REFERENCE