Renesas R8C/Tiny Series, Software Manual

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Glossary-3
Term Meaning Related word
macro instruction
MSB
operand
operation
operation code
overflow
pack
SFR area
An instruction, written in a source language, to be
expressed in a number of machine instructions when
compiled into a machine code program.
Abbreviation for Most Significant Bit
The bit occupying the highest-order position of a
data item.
A part of instruction code that indicates the object on
which an operation is performed.
A generic term for move, comparison, bit processing,
shift, rotation, arithmetic, logic, and branch.
A part of instruction code that indicates what sort of
operation the instruction performs.
To exceed the maximum expressible value as a result
of an operation.
To join data items.
Used to mean to form two 4-bit data items into one 8-
bit data item, to form two 8-bit data items into one 16-
bit data item, etc.
Abbreviation for Special Function Area. An area in
which control bits of peripheral circuits embodied in a
microcomputer and control registers are located.
LSB
operation code
operand
unpack