B.1 Parallel Interface

B.1.2 Interface Signals

Table shows the connector pins and corresponding input and output signals of the parallel interface. Explanation of each signal is also given in the table.

The description in [ ] indicates signal names in Auto mode and Nibble (high) mode (IEEE 1284-compliant). In Auto and Nibble modes, these signals are bidirectional.

Pin

In or

Signal

Description

 

out

 

 

1

In

Strobe† [nStrobe]

A negative-going-strobe pulse causes the printer to read

 

 

 

and latch the data on the Data 0 [1] to Data 7 [8] signal

 

 

 

lines.

2In Data 0 [Data 1]

3

In Data 1 [Data 2]

 

 

4

In Data 2 [Data 3]

 

 

5

In Data 3 [Data 4]

 

 

6

In Data 4 [Data 5]

 

 

7

In Data 5 [Data 6]

 

 

8

In Data 6 [Data 7]

9In Data 7 [Data 8]

These eight signals form one byte of data sent from host computer to printer. Data 7 [8] is the most significant bit.

10

Out

Acknowledge† [nAck]

This negative-going pulse acknowledges the previous

 

 

 

character received.

 

 

 

 

11

Out

Busy [Busy]

When this signal is high, the printer is busy. When it is low,

 

 

 

the printer is able to receive more data.

 

 

 

 

12

Out

Paper Empty

This signal goes high when the printer runs out of paper.††

 

 

[PError]

 

13Out Online (Select) [Select] This signal goes high when the printer is online and low when the printer is offline. The signal goes low when you press the GO key to make the printer go off line.††

14

In

— [nAutoFd]

Ignored

 

 

 

 

15

—

—

Not used

16— 0 V DC

17— Chassis Ground

18

— +5 V DC

This pin is used for the printer’s +5 V DC power supply

 

 

(+5±0.5 V, 400 mA maximum, with fuse)

19— Ground return

20— Ground return

21— Ground return

22— Ground return

23— Ground return

24— Ground return

25— Ground return

26— Ground return

27— Ground return

28— Ground return

29— Ground return

Table B-2

B-3

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Image 197
Xerox FS-C8008DN, FS-C8008N manual Interface Signals, Pin Signal Description Out
Page 196 Page 198

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