Hardware Motheboard_methodological_instructions

Methodological Instructions

Theme: Motherboard

Objective: 10.1.1.1 explain the purpose of a motherboard

Assessment criteria

●                   Is able to compare components of the human bodies and devices in the computer;

●                    indicates the main components of the motherboard in the image: processor, chipset, bridges, BIOS, RAM, video card, sound card, CPU socket, RAM slots, an expansion card slots, storage device connectors: SATA, IDE, peripheral connectors: PS/2, USB Ports.

●                   Explains the purpose of the main components of the motherboard.

Basic Level:

Von Neumann architecture

Key words and phrases:

Hardware, software, motherboard, chipset, RAM, ROM, CMOS, slot, card

Parts of motherboard, chipset consist of, the "brain" of the CPU, the function of North/South bridge.

... The name belongs to the bridge, called ... because…

I.                   Theory

The primary component of a computer is the motherboard (sometimes called the "mainboard"). The motherboard is the hub, which is used to connect all of the computer's essential components.

Pic. 1

As its name suggests, the motherboard acts as a "parent" board, which takes the form of a large printed circuit with connectors for expansion cards, memory modules, the processor, etc.

Characteristics

There are several ways in which a motherboard can be characterised, in particular the following:

·                     the form factor,

·                     the chipset,

·                     the type of processor socket used,

·                     the input-output connectors.

Integrated components

The motherboard includes some on-board components, meaning that they are integrated into its printed circuitry:

·                     The chipset, a circuit which controls the majority of resources (including the bus interface with the processor, cache memory and random-access memory, expansion cards, etc.)

·                     The CMOS clock and battery,

·                     The BIOS,

·                     The system bus and the expansion bus.

What's more, recent motherboards generally include a number of onboard multimedia and networking devices, which can be disabled:

·                     integrated network card;

·                     integrated graphics card;

·                     integrated sound card;

·                     upgraded hard drive controllers.

The chipset

The chipset is an electronic circuit whose job is to coordinate data transfers between the various components of the computer (including the processor and memory). As the chipset is integrated into the motherboard, it is important to choose a motherboard, which includes a recent chipset, in order to maximise the computer's upgradeability.

Some chipsets may include a graphics or audio chip, which means that it is not necessary to install a graphics card or sound card. However, it is sometimes advised to disable them (whenever possible) in the BIOS setup and to install high-quality expansion cards in the appropriate slots.

The CMOS clock and battery

The real time clock (or RTC for short) is a circuit, which synchronizes system signals. It is made from a crystal, which, as it vibrates, gives off pulses (called timer ticks) in order to keep the system elements running on the same time. The timer frequency (expressed in MHz) the number of times the crystal vibrates each second, i.e. the number of timer ticks per second. The higher the frequency, the more information the system can process.

When the computer is turned off, the power supply stops providing electricity to the motherboard. When the computer is turned on again, the system is still on the right time. An electronic circuit, called the CMOS (Complementary Metal-Oxyde Semiconductor, sometimes called the BIOS CMOS), saves some system information, such as the time, the system date, and a few essential system settings.

The CMOS is kept powered by a battery (a button battery), or a battery located on the motherboard. Information on the hardware installed in the computer (such as the number of tracks or sectors on each hard drive) are stored in the CMOS. As the CMOS is a form of slow storage, certain systems sometimes recopy the CMOS's content into the RAM (fast storage); the term "memory shadow" is used to describe this process of copying the data into RAM.

The "complementary metal-oxide semiconductor" is a transistor manufacturing technology, the latest in a long line, which includes the TTL ("Transistor-transistor-logic"), the TTLS (TTL Schottky) (faster), or the NMOS (negative channel) and PMOS (positive channel).

The CMOS allows many complementary channels to run on a single chip. Compared with TTL or TTLS, CMOS is much slower, but it consumes far less energy, which is why it is used in computer clocks, which run on batteries. The term CMOS is sometimes incorrectly used to refer to computer clocks.

When the system time keeps getting reset, or the clock runs late, all that is usually necessary is to change the battery.

The BIOS

The BIOS (Basic Input/Output System) is the basic program used as an interface between the operating system and the motherboard. The BIOS is stored in ROM (read-only memory, which can not be rewritten), so it uses data contained within the CMOS to find out what the system's hardware configuration is.

The BIOS can be configured using an interface (named the BIOS setup), which can be accessed when the computer is booting just be pressing a key (usually the DEL key. In reality, the BIOS setup is only used as an interface for configuration; the data is stored in the CMOS. For more information, check your motherboard's manual.)

The processor socket

The processor (also called the microprocessor) is the computer's brain. It runs programs using a set of instructions. The processor is characterised by its frequency, the rate at which it executes instructions. This means that an 800 MHz processor can carry out 800 million operations per second.

The motherboard has a slot (sometimes several, for multi-processor motherboards) into which the processor is inserted, called the processor socket or slot.

·                     Slot: A rectangular connector into which the processor is mounted vertically.

·                     Socket: In addition to being the general term, it also refers more specifically to a square-shaped connector with many small connectors into which the processor is directly inserted.

Within these two large families, there are different versions used, depending on the type of processor. Whatever slot or socket is used, it is essential that the processor be inserted gently, so that none of its pins are bent (it has hundreds of them). To make inserting them easier, a concept called ZIF (Zero Insertion Force) has been created. ZIF sockets have a small lever, which, when lifted, allows the processor to be inserted without applying any pressure, and when lowered, it holds the processor in place.

The processor generally includes some sort of foolproof device, in the form of a notched corner or colored markings, which must be aligned with the corresponding markings on the socket.

Pic.2

Since the processor releases heat, it is necessary to dissipate it, to keep the circuits from melting. This is why it is generally mounted atop a heat sink (sometimes called a cooler or radiator), which is made of a metal which conducts heat well (copper or aluminium) in order to increase the microprocessor's heat transfer surface. The heat sink includes a base in contact with the processor and fins in order to increase the heat transfer surface. A fan generally accompanies the cooler in order to improve air circulation around it and to improve the heat transfer. The unit also includes a fan, which vents hot air from the case and let fresh air come in from outside.

RAM connectors

RAM (Random Access Memory) is used to store data while the computer is running; however, its contents are wiped out as soon as the computer is switched off or restarted, as opposed to mass storage devices such as hard drives, which keep information safe even while turned off. This is why RAM is called "volatile."

Why, then, is RAM used at all, when hard drives cost less per byte stored? The answer is that RAM is extremely fast when compared to mass storage devices like hard drives. It has a response time approximately a few dozen nanoseconds (about 70 for DRAM, 60 for EDO RAM, and 10 for SDRAM; as little as 6 ns for DDR SDRAM) as opposed to a few milliseconds for a hard drive.

RAM comes in the form of modules, which plug into motherboard connectors.

П. Tests and Assignments for Self-assessment.

1. Find the components of the motherboard and write in a copybook.

a)                  _______________

b)                 _________________

2. There is a motherboard. Write names of 2 selected parts

Answer_______________________________

3. Write the purpose of the main components of the motherboard.

Visual Aids and Materials.

1.                  Slides

2.                  Connect all external and internal devices of a personal computer:  https://learningapps.org/4745565

3.                  Establish a correspondence between the components of the motherboard marked in the photo and their names: https://learningapps.org/402981

4.                  Motherboard  https://www.youtube.com/watch?v=yvboTSpVyfc

5.                              Wikipedia https://en.wikipedia.org/wiki/Cyborg

6.                  Comparing computer and human: http://www.tekmoz.com/computer-fundamentals/

7.                  How does motherboard work https://www.youtube.com/watch?time_continue=57&v=0dfYpoaHKeg

8.                  Motherboard components: http://comp-security.net/

9.                  http://komputercnulja.ru/sistem_blok/materinskaya-plata

10.              http://sonikelf.ru/materinskaya-plata-v-razreze-samoe-polnoe-rukovodstvo-po-nachinke-chast-2/

11.              http://pcabc.ru/to/to13.html

11.

12.              Video for lesson https://www.youtube.com/watch?v=yvboTSpVyfc

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