Lexmark E323 Technical Reference - Page 348

8-10 Interfaces Table 8-1: Parallel Connector Pin Assignments (Continued) Pin IEEE 1284-B Connector IEEE 1284-C Connector Signal Direction Description 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* In signal is active when low 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* Out Inverted logic: signal is active when low 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* In Set low by host computer to select printer. signal is active when low N/A 36 PERIPHERAL LOGIC HIGH Out Driven by the printer. N/A means non-applicable.