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Parallel data port, Parallel port interconnections, 92 zebra xi ii-series user’s guide – Zebra Technologies XiII-Series User Manual

Page 104

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Parallel Data Port

A standard 36-pin parallel connector is available at the rear of the printer for
connection to the data source. When the printer is properly configured for
parallel communications mode, the standard RS-232 port will not function
as an input port. The parallel interface receives data from the data source
but cannot send back printer status information over this port. However, if
the XiII printer receives a “Printer Status Request” command over the paral-
lel interface, it will send back this status over the RS-232 port.

Parallel Port Interconnections

Table 11 shows the pin configuration and function of a standard computer-
to-printer parallel cable.

Table 11. Parallel Connector Pinouts

36-pin

Connector

Description

1

The nStrobe printer input has internal 3.3 kW pull-up resistors to 5 V (I

OL

= 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 active width greater than 0.5 ms 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 Pin 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 error conditions. Busy 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.

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 becomes active when the port is present. In the default condition, Select

is active HIGH whenever 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.

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