1.1.1 Structure and function of the processor Flashcards
List some common input devices.
- Keyboard
- Touch screen
- Puff suck switch
- Eye tracking software
- Microphone
- Joystick
- Cameras
- Barcode reader
- Biometric scanner
- Graphics tablet
- Magnetic strip reader
- Medical imaging devices
- Remote controls
- VR devices
- Mouse
List the common types of processors
- Microprocessors
- RAM
- ROM
- Silicon
- Electrical logic circuits
- GPU
- CPU
List some common output devices.
- Monitor
- Speakers
- Projector
- Printers
- Plotter
- Headphones
- Computer Output Microfilm (COM)
- Braille reader
How does the CPU work and what is its purpose
The central processing unit is used in the computer to store send and receive data throughout the system such as control commands such as read command which is used in reading data it is also used in comparisons of binary values and in internal calculations inside the arithmetic logic unit
How does the RAM work and what is its purpose
This is the main memory in a computer even though it is volatile this therefore means it can be lost it is used by the CPU in the fetch decode cycle this is the process of retrieving data and decoding it inside the CPU it is also used by the CPU to store data and address also used in the CPU.
What is the function of the Address bus
This is used to carry the address of the instruction or the data from the memory address register to the memory this is a one way data flow.
What is the function of the Data bus
This carries data between the processor and the memory this is a bi-directional bus therefore this can send and receive data this can also send the instruction as well as data from the CPU to the memory.
What is the function of the control bus
This sends control signals from the CPU to the components this is also a bi-directional bus this allows from the processor to send and receive the required control signals.
What is the function of the Program counter
This is the program counter and this is used for the fetch decode execute cycle it is used to store the address of the next instruction.
What is the function of the Memory address register
Memory addresses register this stores the address of the data or instruction that are to be retrieved from or sent to the memory. The value of the program counter is the same value as the memory address register unless it is fetching data then it stores the address of the data. This is used as the location of the data or instruction.
What is the function of the Memory address register
This stores the data that is to be sent or retrieved from the memory.
What is the function of the Control unit
Control unit this is used to control data flow throughout the CPU and also how data moves from the CPU to the memory.
What is the function of the ALU
Arithmetic logic unit this is used to do calculations inside the computer and is also used in comparison of binary numbers.
What is the function of the CIR
Current instruction register stores the instruction that is being decoded or executed
What is the function of the Cache
The cache is used to store the last used address and is used by the ram and this allows for quicker processing as during the fetch decode execute cycle the cache is checked before the cycle begins.
