Intel 8XC196NP, 80C196NU, Microcontroller manual Double-Word

8XC196NP, 80C196NU USER’S MANUAL

chip-select unit	The integrated module that selects an external
	memory device during an external bus cycle.
clear	The “0” value of a bit or the act of giving it a “0”
	value. See also set.
deassert	The act of making a signal inactive (disabled). The
	polarity (high or low) is defined by the signal name.
	Active-low signals are designated by a pound symbol
	(#) suffix; active-high signals have no suffix. To
	deassert RD# is to drive it high; to deassert ALE is to
	drive it low.
demultiplexed bus	The configuration in which the device uses separate
	lines for address and data (address on A19:0; data on
	AD15:0 for a 16-bit bus or AD7:0 for an 8-bit bus).
	See also multiplexed bus.
doping	The process of introducing a periodic table Group III
	or Group V element into a Group IV element (e.g.,
	silicon). A Group III impurity (e.g., indium or
	gallium) results in a p-typematerial. A Group V
	impurity (e.g., arsenic or antimony) results in an n-
	type material.
double-word	Any 32-bit unit of data.
DOUBLE-WORD	An unsigned, 32-bit variable with values from 0
	through 232–1.
EDAR	Extended data address register used by the EPORT.
EPA	Event processor array. An integrated peripheral that
	provides high-speed input/output capability.
EPC	Extended program counter used by the EPORT.
EPORT	Extended addressing port. The port that provides the
	additional address lines to support extended
	addressing.
ESD	Electrostatic discharge.
external address	A 20-bit address is presented on the device pins. The
	address decoded by an external device depends on
	how many of these address lines the external system
	uses. See also internal address.
far constants	Constants that can be accessed only with extended
	instructions. See also near constants.
Glossary-2