
| parallel communications mode, the standard | |
| 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 | |
| Parallel Port Interconnections | |
| Table 12 shows the pin configuration and function of a standard computer- | |
| ||
| Table 12. Parallel Connector Pinouts | |
|
| |
Description | ||
Connector |
| |
| The nStrobe printer input has internal 3.3 kΩ | |
1 | designed to receive a signal driven open collector VOL £ 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. | |
|
| |
| Data inputs have TTL input characteristics with internal 3.3 kΩ 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 kΩ internal | ||
| ||
|
| |
| The Busy output is active HIGH whenever the printer cannot accept data due to any normal | |
11 | or abnormal condition, including buffer overflow, head open, over temperature, and media | |
error conditions. Busy is a driven open collector with a 3.3 kΩ internal | ||
| ||
| 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. | |
|
| |
| The Select signal function is determined by an additional configuration option which | |
13 | 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 | ||
| ||
| 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. | |
|
| |
SIGNAL GROUNDS are the Logic Grounds and Returns for all input and output signals. | ||
|
| |
NOT USED - These leads should be left unconnected. | ||
|
| |
36 | NSelectIn (not connected) | |
|
| |
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110 | Zebra XiII Printer User’s Guide |