Interfaces
8-10
18 N/A VCC 300 mA of 5 V +/ - 5%
N/A 18 HOST LOGIC HIGH In Driven by the host.
19–30 19–35 GND Return These pins are grounded signals used as twisted pairs with the data and
control signals. GND is often called a logic ground, and a fusible link
isolates it from chassis ground to offset any large ground shifts when the
printer and computer are on different circuits.
31 14 INIT*
signal is active when
low
In The rising edge of a negative pulse on this line causes the printer to
initialize. The printer synchronizes this function with the received data.
On the falling edge of INIT*, the printer drives the BUSY interface signal
active. On the rising edge of INIT*, the printer:
• Prints all received data
• Displays RESET
• Initializes
• Deactivates the BUSY signal
To disable INIT* processing, set
Honor Init to Off from the printer
operator panel or through MarkVision Professional. Refer to your printer
user documentation for more information.
32 4 ERROR*
Inverted logic: signal
is active when low
Out This signal indicates a printer error condition. The signal level becomes
low when the printer is:
• In paper exception status
• Not ready because of an operator panel command to stop
• Not ready because of a software command to stop
• Not ready because of a software command for manual feed
This signal is activated approximately 5 seconds after one of the above
conditions sets BUSY.
33–35 N/A LOGIC GROUND Not used.
36 16 SLCTIN*
signal is active when
low
In Set low by host computer to select printer.
N/A 36 PERIPHERAL
LOGIC HIGH
Out Driven by the printer.
Table 8-1: Parallel Connector Pin Assignments (Continued)
Pin
Signal Direction Description
IEEE 1284-B Connector
IEEE 1284-C Connector
N/A means non-applicable.
