Lexmark Printer manual Vcc, Host Logic High, Gnd, Init, Error, Slctin, Peripheral

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	The rising edge of a negative pulse on this line causes the printer to
		signal is active when		initialize. The printer synchronizes this function with the received data.
				On the falling edge of INIT*, the printer drives the BUSY interface signal
		low
				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	This signal indicates a printer error condition. The signal level becomes
		Inverted logic: signal		low when the printer is:
		is active when low		• 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	Out	Driven by the printer.
		LOGIC HIGH

N/A means non-applicable.