CHAPTER 6: INSIDE COMPUTER AND MOBILE DEVICES

CHAPTER 6: INSIDE COMPUTER AND MOBILE DEVICES

Inside the Case

The case contains and protects the electronics of the computer or mobile device from damage




The motherboard is the main circuit board of the computer
-A computer chip contains integrated circuirt
Laptop motherboard

Desktop motherboard



Processors

The processor, also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer
Contain a control unit and an arithmetic logic unit (ALU)


A multi-core processor is a single chip with two or more separate processor cores


The control unit is the component of the processor that directs and coordinates most of the operations in the computer

The 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

The leading manufacturers of personal computer processor chips are Intel and AMD
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
Home and business users choose cloud computing for a variety of reasons such as:
  • Cost savings 
  • Accessibility
  • Space savings
  • Scalability
Data Representation
Analog signals: continuous and vary in strength and quality
Digital signals: have two state that is On or Off


Memory

Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processing the data

Stores three basic categories of items:
  • The operating system and other programs
  • Application
  • Data being processed and the resulting information
The system unit contains two types of memory
   Volatile memory                         VS         Non-volatile memory
   Loses it contents when power              Does not loses its content when
   is turned off                                          power is turned off
   Example: RAM                                   Example:ROM,Flash memory                                                                                   CMOS

Flash memory can be erased electronically and rewritten.

Access time is the amount of time it takes the processor to read from memory
Measured in nanoseconds
10 million operations = 1 blink 

Adapters
An adapter card enhances functions of a component of a desktop or server system unit and/or provides connections to peripherals
-Sound card and graphics card

An expansion slot is a socket on a desktop or server motherboard that can hold an adapter card
With 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
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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