Hardware
- Created by: Epic Al
- Created on: 27-06-22 17:07
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- Hardware
- CPU
- central processing unit
- components
- clock
- Synchronises actions
- Control unit
- fetches program instructions
- Arithmetic logic unit (ALU)
- Registers
- direct access storage for instructions
- Address bus
- CPU ->memory
- Data bus
- 2 way
- Control bus
- 2 way
- clock
- Secondary storage
- Non volatile memory
- long term
- programs and data must be transferred to memory to be accessed by the CPU
- Large storage capacity
- Types of secondary storage
- Magnetic storage
- High capacity
- Fast data access
- has moving parts that will eventually fail
- noisy
- Optical storage
- CD, DVD, Blu-ray
- portable
- disks are cheap
- uses a laser
- slow to access
- prone to scratches
- Solid sate drive (SSD)
- USB drives, SSD cards, mobile devices and wearables
- very fast data access
- no moving parts
- Low power
- quiet
- relatively expensive
- has a limited number of read-write cycles
- Magnetic storage
- Embedded systems
- designed for a specific task
- customised hardware and software
- limited memory and processing power
- low power consumption
- wireless connectivity
- minimal or no user interface
- small physical size
- responsive to their environment
- low maintenance
- usually operate in real time
- CPU
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