Xerox 4213 manual Dataproducts, Centronics Interface Voltage, Requirements

INTERFACES

Table 1-3 describes Centronics interface voltage and current requirements

Table 1-3.	Centronics	interface	voltage	and	current
	requirements
Voltage levels	0 (zero) and +5 VDC (nominal), TTl (SN
	74LS00 series
Logic levels	Positive logic is assumed. A logic one
	(high) signal is defined as a voltage in the
	range of +2.4V to +5V, not to exceed a
	peak of +5.5V.
	A logic zero (low) signal is defined as a
	voltage in the range of 0.0V to 0.4V, not to
	exceed a peak negative voltage of -0.5V.
	However for received signals a voltage of up
	to +0.8V is recognised as a logic zero.
Current	The printer interface sources up to -15 ma at
requirements	+2.4V for a high output signal and sinks up
	to 14 ma for a low output.
	74LS374 ICs are used for data receivers with
	1K ohm pull-up resistors, and 74LS244 ICs
	are used as drivers for Acknowledge, Busy,
	Select, etc.
Data rates	The 4213 supports burst data rates of up to
	50 Kbytes per second for at least 512 bytes.

Dataproducts 2260

Select the Dataproducts parallel interface

The Dataproducts parallel interface is selected through the User

Interface.

1.Press the Online H button.

2.Press the Menu A button.

3.Press the Last Page C button until HOST INTERFACE appears.

XEROX 4213 LASER PRINTER PROGRAMMER REFERENCE 1-7