Signal Descriptions

The following chart provides a description of each of the pins in the parallel connector. A standard parallel data cable will provide the required interconnection between the computer and the printer.

 

Parallel Connector Pin Assignments

 

 

Pin No.

Description

1

The nStrobe printer input has internal 3.3 kW pull-up resistors t o 5 V (IOL= 1.5 mA) and is

 

designed to receive a signal driven open collector V OL <= 0.8 V. This pin is a signal from

 

the host computer. The nStrobe input is debounced on a LOW going edge to require an ac-

 

tive width greater than 0.5 μs before data is latched.

 

 

2 - 9

Data inputs have TTL input characteristics with internal 3.3 kW pullups and represent 1 TTL

 

unit load or less. The Data inputs are positive logic with a HIGH voltage level corresponding

 

to a logic 1. Pin 2 through Pi n 9 = D0 through D7 respectively.

 

 

10

The nAck output is an active LOW pulse used to indicate termination. nAck is a driven open

 

collector with a 3.3 kW internal pull-up. The output sinks 7 mA to a V OL <= 0.4 V.

 

 

11

The Busy output is active HIGH whenever the printer cannot accept data due to any normal

 

or abnormal condition, including buffer overflow, head open, over temperature, and media er-

 

ror conditions. Busy is a driven open collector with a 3.3 kW internal pull-up. The output

 

sinks 7 mA to a VOL <= 0.4 V.

 

 

12

The PError signal is active HIGH whenever the printer is out of media or ribbon.

 

 

13

The Select signal function is determined by an additional configuration option which be-

 

comes active when the port is present. In the default condition, Select is active HIGH when-

 

ever the parallel port is powered up and the parallel port is enabled. In the non-default

 

condition, Select will go active LOW whenever the printer is printing.

 

 

14

nAutoFd (not connected)

 

 

15

Not defined

 

 

16

Logic Gnd

 

 

17

FRAME GROUND is at the same potential as Logic Gnd (pin 16).

 

 

18

FUSED 5 V - 1 A maximum.

 

 

19 - 30

SIGNAL GROUNDS are the Logic Grounds and Returns for all input and output signals.

 

 

31 - 35

NOT USED - These leads should be left unconnected.

 

 

36

NSelectIn (not connected)

 

 

5-6

Zebra S-Series User’s Guide