CHAPTER 6 - Inside Computers and Mobile Devices
-The case contains and protects the electronics of the computer or mobile device from damage
Inside the Case
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Computer
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Laptop
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Video card
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Battery
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Memory module
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Memory module
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Heat sink & fan
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Heat sink & fan
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Processor
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Processor
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Power supply and fan
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Integrated sound ports and circuitry
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Sound card
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Processor:
- Interprets and carries out the basic instructions that operate a compute
- 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 arithmetic logic unit (ALU) performs arithmetic, comparison, and other operations
- The control unit is the component of the processor that directs and coordinates most of the operations in the computer
- A processor chip generates heat that could cause the chip to malfunction or fail
- Require additional cooling:Heat sinks, Liquid cooling technology, Cooling mats.
- The leading manufacturers of personal computer processor chips are Intel and AMD
Home and business users choose cloud computing for a variety of reasons:
- Accessibility
- Cost savings
- Space savings
- Scalability
•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)
-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.
Types of Memory
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Volatile Memory
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Nonvolatile Memory
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Loses its contents when power is turned off
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Does not lose contents when power is removed
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Example RAM
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Examples ROM, flash memory, and CMOS
*Read-only memory (ROM) refers to memory chips storing permanent data and instructions
*Flash memory can be erased electronically and rewritten.
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- Access time is the amount of time it takes the processor to read from memory
- Measured in nanoseconds (ns), speed = One-billionth of a second
- An adapter card enhances functions of a component of a desktop or server system unit and/or provides connections to peripherals
- 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
USB
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Network
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Audio
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Video Adapter
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Bluetooth
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- 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
