Processing Unit
,Overview
⚫ Instruction Set Processor (ISP)
⚫ Central Processing Unit (CPU)
⚫ A typical computing task consists of a series
of steps specified by a sequence of machine
instructions that constitute a program.
⚫ An instruction is executed by carrying out a
sequence of more rudimentary operations.
,Some Fundamental
Concepts
, Fundamental Concepts
⚫ Processor fetches one instruction at a time and
perform the operation specified.
⚫ Instructions are fetched from successive memory
locations until a branch or a jump instruction is
encountered.
⚫ Processor keeps track of the address of the memory
location containing the next instruction to be fetched
using Program Counter (PC).
⚫ Instruction Register (IR)