Discovering Computers. Technology in a World of Computers, Mobile Devices, and the Internet. Chapter 6. Inside Computers and Mobile Devices
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1 Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 6 Inside Computers and Mobile Devices
2 Objectives Overview Describe the various computer and mobile device cases and the contents they protect Describe multi-core processors the components of a processor, and the four steps in a machine cycle Identify characteristics of various personal computer processors on the market today, and describe the ways processors are cooled Explain the advantages and services of cloud computing Define a bit, and describe how a series of bits represents data Explain how program and application instructions transfer in and out of memory See Page 248 for Detailed Objectives Discovering Computers 2014: Chapter 6 2
3 Objectives Overview Differentiate among the various types of memory Describe the purpose of adapter cards, USB adapters, and ExpressCard modules Explain the function of a bus Explain the purpose of a power supply and batteries Understand how to care for computers and mobile devices See Page 248 for Detailed Objectives Discovering Computers 2014: Chapter 6 3
4 Inside the Case The case contains and protects the electronics of the computer or mobile device from damage Page 248 Figure 6-1 Discovering Computers 2014: Chapter 6 4
5 Inside the Case Page 250 Figure 6-2 Discovering Computers 2014: Chapter 6 5
6 Inside the Case The motherboard is the main circuit board of the computer A computer chip contains integrated circuits Pages Figure 6-3 Discovering Computers 2014: Chapter 6 6
7 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 Pages Discovering Computers 2014: Chapter 6 7
8 Processors Page 253 Figure 6-4 Discovering Computers 2014: Chapter 6 8
9 Processors 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 Page 253 Discovering Computers 2014: Chapter 6 9
10 Processors For every instruction, a processor repeats a set of four basic operations, which comprise a machine cycle Page 254 Figure 6-5 Discovering Computers 2014: Chapter 6 10
11 Processors The processor contains registers, that temporarily hold data and instructions The system clock controls the timing of all computer operations The pace of the system clock is called the clock speed, and is measured in gigahertz (GHz) Page 255 Discovering Computers 2014: Chapter 6 11
12 Processors The leading manufacturers of personal computer processor chips are Intel and AMD Page 255 Discovering Computers 2014: Chapter 6 12
13 Processors A processor chip generates heat that could cause the chip to malfunction or fail Require additional cooling Heat sinks Liquid cooling technology Cooling mats Pages Figures Discovering Computers 2014: Chapter 6 13
14 Cloud Computing Home and business users choose cloud computing for a variety of reasons Accessibility Cost savings Space savings Scalability Page 257 Discovering Computers 2014: Chapter 6 14
15 Data Representation Analog signals are continuous and vary in strength and quality Digital signals are in one of two states: on or off Most computers are digital The binary system uses two unique digits (0 and 1) Bits and bytes Page 259 Discovering Computers 2014: Chapter 6 15
16 Data Representation The circuitry in a computer or mobile device represents the on or the off states electronically by the presence or absence of an electronic charge Eight bits grouped together as a unit are called a byte. A byte represents a single character in the computer or mobile device Pages Figures Discovering Computers 2014: Chapter 6 16
17 Data Representation Page 260 Figure 6-10 Discovering Computers 2014: Chapter 6 17
18 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 Applications Data being processed and the resulting information Page 261 Discovering Computers 2014: Chapter 6 18
19 Memory Each location in memory has an address Memory size commonly is measured in gigabytes (GB) or terabytes (TB) Page 261 Figure 6-11 Discovering Computers 2014: Chapter 6 19
20 Memory The system unit contains two types of memory: 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 Page 262 Discovering Computers 2014: Chapter 6 20
21 Memory Page 262 Figure 6-12 Discovering Computers 2014: Chapter 6 21
22 Memory Two common types of RAM chips exist: Dynamic RAM Static RAM (SRAM) (DRAM) Page 263 Table 6-1 Discovering Computers 2014: Chapter 6 22
23 Memory RAM chips usually reside on a memory module and are inserted into memory slots Page 263 Figure 6-13 Discovering Computers 2014: Chapter 6 23
24 Memory Memory cache speeds the processes of the computer because it stores frequently used instructions and data Page 265 Figure 6-14 Discovering Computers 2014: Chapter 6 24
25 Memory Read-only memory (ROM) refers to memory chips storing permanent data and instructions Firmware Page 265 Discovering Computers 2014: Chapter 6 25
26 Memory Flash memory can be erased electronically and rewritten CMOS technology provides high speeds and consumes little power Pages Discovering Computers 2014: Chapter 6 26
27 Memory Access time is the amount of time it takes the processor to read from memory Measured in nanoseconds Page 267 Table 6-2 and Figure 6-15 Discovering Computers 2014: Chapter 6 27
28 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 Page 269 Table 6-3 Discovering Computers 2014: Chapter 6 28
29 Adapters With Plug and Play, the computer automatically can recognize peripheral devices as you install them Page 269 Figure 6-16 Discovering Computers 2014: Chapter 6 29
30 Adapters Adapters for mobile computers are in the form of a removable flash memory device USB adapter ExpressCard module Page 269 Figures Discovering Computers 2014: Chapter 6 30
31 Buses A bus allows the various devices both inside and attached to the system unit to communicate with each other Data bus Address bus Word size is the number of bits the processor can interpret and execute at a given time Pages Figure 6-19 Discovering Computers 2014: Chapter 6 31
32 Buses A computer might have these three types of buses: System bus Backside bus Expansion bus Page 271 Discovering Computers 2014: Chapter 6 32
33 Power Supply and Battery The power supply or laptop AC adapter converts the wall outlet AC power into DC power Page 271 Figure 6-20 Discovering Computers 2014: Chapter 6 33
34 Power Supply and Battery Mobile computers and devices can run using either a power supply or batteries Batteries typically are rechargeable lithium-ion batteries Page 272 Figure 6-21 Discovering Computers: Chapter 6 34
35 Summary Various components inside computers and mobile devices Types of processors, steps in a machine cycle, and processor cooling methods Advantages and services of cloud computing How memory stores data and described various types of memory Adapters, buses, power supplies and batteries Ways to care for computers and mobile devices Page 275 Discovering Computers: Chapter 6 35
36 Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 6 Inside Computers and Mobile Devices Chapter 6 Complete
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