Genicom microLaser 170 - Manual (Page 123)

110 Zebra XiII Printer User’s Guide
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 12 shows the pin configuration and function of a standard computer-
to-printer parallel cable.
Table 12. Parallel Connector Pinouts
36-Pin
Connector
Description
1
The nStrobe printer input has internal 3.3 k
Ω
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 k
Ω
pullups and represent 1
TTL unit load or less. The Data inputs are positive logic with a HIGH voltage level corre-
sponding 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 k
Ω
internal pull-up. The output sinks 7 mA to a VOL £ 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 k
Ω
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
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.
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)
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