Unit 3: Hardware

Match

Match the following registers to its function.

• stores the current instructions being decoded and executed

• used when carrying out ALU calculations

• stores addresses of the memory location currently being read from or written

• stores data which has been read from memory or data which is about to be written in the memory

• stores the address where the next instruction to be read can be found

CIR (current instruction register)

ACC (accumulator)

MAR (memory address register)

MDR (memory data register)

PC (program counter)

• CIR (current instruction register)

• ACC (accumulator)

• MAR (memory address register)

• MDR (memory data register)

• PC (program counter)

Open Ended

Give the five registers found in the CPU.

Open Ended

Explain what is meant by CPU.

Open Ended

What are the three components of CPU?

Open Ended

Give the function of Control Unit.

Open Ended

Give the function of ALU.

Open Ended

Give the function of System clock.

Reorder

Reorder the following Fetch-Decode-Execute cycle the first step is:

The PC contains the address of the memory location of the next instruction to be fetched

What is next?

• Address is then copied from the program counter (PC) to the memory address register (MAR) via the

  address bus

  
  

• Contents of memory location contained in MAR are then copied into MDR

• The contents (instruction) of the MDR are then

  copied and placed into the Current Instruction

  Register (CIR)

  
  

• Value of the PC is incremented by 1 so it now points to the next instruction to be fetched

• Instruction is decoded and then executed by sending out signals via the control bus to the computer components

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Labelling

Label the missing components of CPU

Drag labels to their correct position on the image

ALU

system clock

CU (Control Unit)

Random Access Memory

Memory Data Register

Memory Address Register

Open Ended

Describe the role of MAR in fetch-decode-execute cycle.

Open Ended

Describe the role of MDR in fetch-decode-execute cycle.

Drag and Drop

An​

Placeholder

is a combination of hardware and ​

Placeholder

which is designed to carry out specific set of ​

Placeholder

Drag these tiles and drop them in the correct blank above

embedded system

software

functions.

inputs

Categorize

Options (16)

keyboard

mouse

barcode scanner

infrared

magnetic field

scanner

digital camera

sensors

actuators

speakers

LED screen

microphone

light projector

inkjet printer

monitor

Organize these options into the right categories

input devices

output devices

Categorize

Options (7)

Random Access memory

Read only Memory

HDD

SSD

optical storage

USB drive

removable hard drive

Organize these options into the right categories

Primary Memory

Secondary Storage (internal)

Secondary Storage (external)

Open Ended

What is the purpose of secondary storage.?

Open Ended

Explain the function/ use of a RAM

Open Ended

explain what is meant by Dynamic IP address