CHAPTER 6: INSIDE COMPUTER AND MOBILE DEVICE

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 circuits

PROCESSOR

• ·         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
• ·         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

-          Accessibility

-          Cost savings

-          Space savings

-          Scalability

DATA REPRESENTATION

• ·         Analog signals are continuous and vary in strength and quality
• ·         Digital signals are in one of two states: on or off
• ·         The binary system use two units digit (0 and 1)

         0 – off

         1 – on

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 program

-          Application

• ·         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

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

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