Lexmark Printer Parallel Connector Pin Assignments, Pin Connector, Signal Direction Description

8-9

Interfaces

•To prevent line noise, the cables should be shielded and connected to the chassis of both the computer and the printer. The parallel cable length should not exceed 3.04 m (10 ft), unless a Lexmark 6.1 m (20 ft) parallel cable is used.

Table 8-1: Parallel Connector Pin Assignments

Pin
1284-B Connector	1284-C Connector
IEEE	IEEE	Signal	Direction	Description
1	15	STROBE*	In	The computer generates this signal to allow the printer to read in data.
		Inverted logic: signal		The signal level is normally high: data is sampled at the falling edge of
				this pulse.
		is active when low
2–9	6–13	DATA0 through	In/Out	These signals represent data bits 0 to 7, respectively. Each signal is at a
		DATA7		high level when data is logical 1, and low when data is logical 0. Pin 2 is
				the least significant bit.
				Note: Data is driven out only when the printer is in IEEE 1284 Byte or
				ECP modes.
10	3	ACKNLG*	Out	This negative pulse indicates the printer can again accept data.
		Inverted logic: signal
		is active when low
11	1	BUSY	Out	A high signal indicates the printer cannot receive data. The signal is
				high:
				•	During initialization
				•	During data sampling
				• When the buffer is full
				• In the not ready state
				• During a printer error
				A low signal indicates the printer is not busy and the computer can again
				send data.
12	5	PE	Out	Paper Exception signal indicates no paper is loaded, a paper jam exists,
				or a paper feed error occurred.
13	2	SLCT	Out	Select signal indicates the printer is selected and is online. This signal is
				normally active. It becomes inactive when the printer is offline.
14	17	AUTO FEED XT*	In	Host Busy when Advanced Status is On.
		Inverted logic: signal
		is active when low.
15-17	N/A	LOGIC GROUND		Logic Ground

N/A means non-applicable.