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CHAPTER 6 (Inside Computers And Mobile Devices)


CHAPTER 6 INSIDE COMPUTERS AND MOBILE DEVICES

 Objective Overview
1)    Describe the various computer and mobile device cases and the contents they protect
2)    Describe multi-core processors the components of a processor, and the four steps in a machine cycle
3)    Explain the advantages and services of cloud computing
4)    Define a bit, and describe how a series of bits represents data
5)    Describe the purpose of adapter cards, USB adapters, and ExpressCard modules
6)    Explain the purpose of a power supply and batteries
7)    Understand how to care for computers and mobile devices
Inside The Case 

Desktop
·         Motherboard : The main circuit board of the computer
·         Video card
·         Sound card
·         Processor Memory module
·         Power supply and fan
Laptop
·         Battery
·         Processor
·         Memory module
·         Integrated sound parts and circuity

Processors

Central Processing Unit (CPU) : Interprets and carries out the basic instructions that operate a computer

Multi-core processor : A single chip with two or more separate processor cores

Control Unit : The component of the processor that directs and coordinates most of the operations in the computer

Arithmetic Logic Unit (ALU):Performs arithmetic, comparison, and other operations

For every instruction, a processor repeats a set of four basic operations, which consist of a machine cycle

A processor chip generates heat that could cause the chip to malfunction or fail

Require additional cooling

-       Heat sinks
-       Liquid cooling technology
-       Cooling mats

Cloud Computing 

1)    Accessibility
2)    Cost savings
3)     Space savings
4)    Scability

Data Representation

•         Analog signals are continuous and vary in strength and quality
•         Digital signals are in one of two states: on or off

Memory

-      The operating system and other programs
-      Applications
-      Data being processed and the resulting information

Volatile memory
Nonvolatile memory
•         Loses its contents when power is turned off
Does not lose contents when power is removed
•         Example includes RAM
Examples include ROM, flash memory, and CMOS


·        Read-Only Memory (ROM) : Memory chips storing permanent data and instructions
·        Flash memory : can be erased electronically and rewritten

Adapters 

·         Plug and play : the computer automatically can recognize peripheral devices as you install them

Power Supply and Battery

·         The power supply or laptop AC adapter converts the wall outlet AC power into DC power
·         Mobile computers and devices can run using either a power supply or batteries
·         Batteries typically are rechargeable lithium-ion batteries







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