Intel 8XC196Lx, 8XC196Jx, 8XC196Kx, 87C196CA user manual Quad-Word, Ralu

	GLOSSARY
PTS vector	A location in special-purpose memory that holds the
	starting address of a PTS control block.
QUAD-WORD	An unsigned, 64-bit variable with values from 0
	through 264–1. The QUAD-WORD variable is
	supported only as the operand for the EBMOVI
	instruction.
quantizing error	An unavoidable A/D conversion error that results
	simply from the conversion of a continuous voltage to
	its integer digital representation. Quantizing error is
	always ± 0.5 LSB and is the only error present in an
	ideal A/D converter.
RALU	Register arithmetic-logic unit. A part of the CPU that
	consists of the ALU, the PSW, the master PC, the
	microcode engine, a loop counter, and six registers.
repeatability error	The variation in code transitions when comparing a
	number of actual characteristics from the same
	converter on the same channel with the same temper-
	ature, voltage, and frequency conditions. The amount
	of repeatability error depends on the comparator’s
	ability to resolve very similar voltages and the extent
	to which random noise contributes to the error.
reserved memory	A memory location that is reserved for factory use or
	for future expansion. Do not use a reserved memory
	location except to initialize it.
resolution	The number of input voltage levels that an A/D
	converter can unambiguously distinguish between.
	The number of useful bits of information that the
	converter can return.
sample capacitor	A small (2–3 pF) capacitor used in the A/D converter
	circuitry to store the input voltage on the selected
	input channel.
sample delay	The time period between the time that A/D converter
	receives the “start conversion” signal and the time
	that the sample capacitor is connected to the selected
	channel.
sample delay uncertainty	The variation in the sample delay.
sample time	The period of time that the sample window is open.
	(That is, the length of time that the input channel is
	actually connected to the sample capacitor.)
	Glossary-9