Renesas R8C/Tiny Series Software Manual page 290

Term
macro instruction
MSB
operand
operation
operation code
overflow
pack
SFR area
Meaning
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 in a
data item.
A part of instruction code that indicates the object of
an operation.
A generic term for move, comparison, bit processing,
shift, rotation, arithmetic, logic, and branch.
A part of an 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 Register area. An
area in which control bits for the on-chip peripheral
circuits of the microcomputer and control registers are
located.
Glossary-3
Related word
LSB
operation code
operand
unpack