•Combinational
and sequential circuits can be used to create simple digital systems.
•These
are the low-level building blocks of a
digital computer.
•Simple
digital systems are frequently characterized in terms of
–the
registers they contain, and
–the
operations that they perform.
•Typically,
–What
operations are performed on the data in the registers
–What
information is passed between registers
•The operations executed on
data stored in registers are called microoperations.
•Examples of microoperations
–Shift
–Load
–Clear
–Increment
–Count
An elementary operation performed
(during one clock pulse), on the information stored in one or more registers
