7/30/2019 T2.2 [Computer Component- System Unit]
1/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
A Member Of
COM1012
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
1
7/30/2019 T2.2 [Computer Component- System Unit]
2/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Learning OutcomesDifferentiate among various
styles of system units ondesktop computers,
notebook computers, andmobile devices
Describe the control unitand arithmetic logic unit
components of a processor,and explain the four steps in
a machine cycle
Define a bit and describehow a series of bits
represents data
Differentiate among thevarious types of memory
Describe the purpose andtypes of expansion slots and
adapter cards
Differentiate between a portand a connector, and explain
the differences among aUSB port and other ports
Explain the function ofpower supply
2
7/30/2019 T2.2 [Computer Component- System Unit]
3/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
The System Unit
The system unitis a case that contains electronic
components of the computer used to process data.
All computers and mobile devices have a system unit.3
case
7/30/2019 T2.2 [Computer Component- System Unit]
4/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
System
Unit
DriveBay
Power
Supply
Sound
Card
Video
Card
Processor
Memory
4
7/30/2019 T2.2 [Computer Component- System Unit]
5/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
The System Unit The inside of the system unit on a desktop
personal computer includes:
5
Drive bay(s)
Power supply
Sound card
Video card
Processor
Memory
7/30/2019 T2.2 [Computer Component- System Unit]
6/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
The Motherboard The motherboard is the
main circuit board of the
system unit A computer chip
contains integratedcircuits
Memory chips areinstalled on memorymodules that fit in a sloton the motherboard.
6
main circuit board
7/30/2019 T2.2 [Computer Component- System Unit]
7/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
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)
7
basic
instructions
7/30/2019 T2.2 [Computer Component- System Unit]
8/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Processor 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
8
7/30/2019 T2.2 [Computer Component- System Unit]
9/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Processor
For every instruction, a processor repeats a set of
four basic operations (fetch- decode- execute-
store), which comprise a machine cycle. 9
7/30/2019 T2.2 [Computer Component- System Unit]
10/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Processor
The system clock controls the timing of allcomputer operations
The pace of the system clock is called the clockspeed, and is measured in gigahertz (GHz)
10
7/30/2019 T2.2 [Computer Component- System Unit]
11/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Data Representation
Most computers are digital
Digital signals are in one of two states:
on or off
Most computers are digital
The binary systemuses two unique digits (0 and 1)
Bits and bytes11
7/30/2019 T2.2 [Computer Component- System Unit]
12/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Data RepresentationA computer circuit representsthe 0 or the 1 electronically bythe presence or absence of anelectrical charge
Eight bits grouped together as aunit are called a byte. A byterepresents a single character inthe computer
12
7/30/2019 T2.2 [Computer Component- System Unit]
13/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Data Representation ASCII(American standard
Code for Information
Interchange) is the mostwidely used coding
scheme to represent data
13
7/30/2019 T2.2 [Computer Component- System Unit]
14/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
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:
14
The operatingsystem and othersystem software
Applicationprograms
Data beingprocessed and the
resultinginformation
7/30/2019 T2.2 [Computer Component- System Unit]
15/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory
Each location in memory has an address
Memory size is measured in kilobytes (KB or K),
megabytes (MB), gigabytes (GB), orterabytes (TB)
15
O O2
7/30/2019 T2.2 [Computer Component- System Unit]
16/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory The system unit contains two types of memory:
16
Volatile memory
Loses its contents whenpower is turned off
Example includes RAM
Nonvolatile memory
Does not lose contentswhen power is removed
Examples include ROM,flash memory, and
CMOS
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
17/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory
RAM (Random Access Memory) is a memory
chips that temporary holds data and instructions
in current use . (operating system, applicationprograms and data)
RAM chips usually reside on a memory module
and are inserted into memory slots 17
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
18/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory RAM is much faster to read from and write to than
the other kinds of storage in a computer, the hard
disk, floppy disk, and CD-ROM. Memory cache speeds the processes of the
computer because it stores frequently used
instructions and data
18
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
19/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory
However, the data in RAM stays there only as long
as the computer is running.
When the computer is switched off, the contentsof the RAM are lost.
When user turn the computer on again, the
operating system and other files are once again
loaded into RAM, usually from the hard disk.
19
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
20/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory
20
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
21/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory
Read-only memory (ROM)refers to memory chips storing
permanent data andinstructions
21
Data has been written onto a ROM
chips, cannot be removed and can only
be read.
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
22/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory Flash memory is a non- volatile
chip that can be electrically erased
and reprogrammed. Complementary metaloxide
semiconductor (CMOS) technology
provides high speeds and
consumes little power.
22
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
23/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Memory Access timeis the amount of time it takes the
processor to read from memory
Measured in nanoseconds
23
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
24/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Expansion Slots and Adapter Cards An expansion slotis a socket
on the motherboard that can
hold an adapter card
An adapter card enhancesfunctions of a component of
the system unit and/or
provides connections to
peripherals
Sound card andvideo
card
24
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
25/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Expansion Slots and Adapter Cards
25
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
26/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Expansion Slots and Adapter Cards With Plug and Play, the computer automatically
can configure adapter cards and other peripherals
as you install them
26
automatically
configure
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
27/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Expansion Slots and Adapter Cards
Removable flash memory includes:
Memory cards, USB flash drives, and PC Cards /
ExpressCard modules
27
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
28/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Ports and ConnectorsA port is the point atwhich a peripheral
attaches to orcommunicates with asystem unit
(sometimes referred
to as a jack)
A connector joins acable to a port
28
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
29/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Ports and Connectors
29
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
30/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Ports and Connectors On a notebook computer, the ports are on the
back, front, and/or sides
30
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
31/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Ports and Connectors Port Types
31
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
32/34
MO1 MO2
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Ports and Connectors A USB port can connect up to 127 different
peripherals together with a single connector
You can attach multiple peripherals using a single USB
port with a USB hub
32
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
33/34
O O
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A Member Of
COM1012
Power SupplyThe power supplyconverts the wall outletAC (Alternating Current) power intoDC(Direct Current) power
Some external peripherals have an ACadapter, which is an external powersupply
33
MO1 MO2
7/30/2019 T2.2 [Computer Component- System Unit]
34/34
Describe basic computer hardware, software, input,
output, communication and network devices.
To apply the suitable office application to
fulfill given task.
A M b Of
Power Supply
AC adapter
Power Supply