Central Processing Unit

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Central Processing Unit - PowerPoint PPT Presentation

Central Processing Unit. CPU or Processor. Central Processing Unit. Components Control Unit Arithmetic & Logic Unit. Central Processing Unit. Control Unit Reads & Interprets Program Instructions Directs the Operation of the Processor

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Presentation Transcript

CPU or Processor

Central Processing Unit

Components

Control Unit

Arithmetic & Logic Unit

Central Processing Unit

Control Unit

Directs the Operation of the Processor

Controls the flow of programs and data into and out of memory

Central Processing Unit

Arithmetic & Logic Unit

Arithmetic:

Logic:

Comparisons

Machine Cycle

Fetch

Decode

Execute

Store

Central Processing Unit

Fetch

Calls an instruction into memory

Central Processing Unit

Decode

Figures out what the instruction is trying to do

Central Processing Unit

Execute

Does the decoded instruction

Central Processing Unit

Store

Puts the answer 4 into memory for use by another instruction

Central Processing Unit

Clock Cycle

A Crystal Oscillator on the Motherboard

It paces the machine cycle

Central Processing Unit

Clock Cycle

Measured in MHz or GHz

Megahertz = 1,000,000 cycles/sec

Gigahertz = 1,000,000,000 cycles/sec

Central Processing Unit

Clock Cycle

One clock cycle is calculated by dividing 1 by the MHz or GHz

Example: (800 MHz CPU)

1/800,000,000 =

0.00000000125 or

1.25 nanoseconds (nano = billionth)

(1.25 billionths of a second)

Central Processing Unit

Clock Cycle

The shorter the clock cycle the faster the processor

Central Processing Unit

Pipelining

Executing multiple instructions at the same time

Central Processing Unit

Parallel Processing

Multiple processors work together to complete a set of instructions

CPU 01

Control

CPU

CPU 02

Central Processing Unit

Dual-Core

A dual-core CPU combines two independent processors and their respective caches and cache controllers onto a single silicon chip

Dual-Core

Central Processing Unit

Less Power

Less Space

Better Performance

Central Processing Unit

Require Different OS

Scalability more limited

Lower production yields

INTEL

AMD

TRANSMETA

MOTOROLA

INTEL

AMD

TRANSMETA

MOTOROLA & IBM

Questions

Central Processing Unit

Assignment 01

Explain the difference between the Intel Dual-Core and AMD Dual-Core CPUS. What makes them different.

Double-Spaced, 12pt Font, w/References

Due: Wed Sept 7th