What is a computer system?
Hardware and software working together to complete a task
What does a computer system do?
A computer system takes INPUT, PROCESSES the data that has been input and the OUTPUTs it
What is meant by hardware?
A physical component of a computer system
What hardware components are usually found in a computer system?
- Power Supply Unit
- Cooling Fan
- CPU Heat Sink
- Graphics Card
- Optical Drive
- Hard Disk Drive
What is a peripheral device?
- A device that is not directly connected to the CPU
- A peripheral does not take part in the computers core architecture involved in memory and processing
- Peripherals include input hardware, output hardware and storage devices.
What is the purpose of an input device?
Sends data and control signals to the CPU for processing
Name 3 of the most common input devices
- Games controller
- Touch Screen
What is the purpose of an output device?
A device that receives information from the CPU and turns it into human-usable form
Name 3 of the most common output devices
- Screen / monitor
What is meant by an ‘embedded system’?
A computer system that is built into another device
What are 3 examples of common embedded systems?
- MP3 player
- Washing machine
- Mobile phone
- Manufacturing equipment
- Satellite Navigation system
- DVD Player
What are the characteristics of an embedded system?
- Usually used in control systems.
- Usually used to monitor and control machinery
- It has a dedicated / specific function within a larger device
- Software is programmed into the device (usually in ROM)
What are the benefits of using an embedded system instead of a general purpose computer?
Size - embedded systems are smaller than general purpose computers - therefore the device can be smaller than an general purpose computer (e.g. worn within fitness tracker / smart watch / smart phone)
Cost - embedded systems are cheaper to produce than general purpose computers - this keep down the cost of producing the device
Reliability - embedded systems tend to be more reliable than general purpose computers - therefore the device is less likely to break
Reliability - the whole system may still function if a non-essential embedded system does not work /damaged
Efficient - embedded systems are more efficient at doing task
Energy - embedded systems are low powered devices - therefore use less power / electricity to run than a general purpose computer
What parts of a Smart TV would use an embedded system?
- Wi-fi connectivity
- Speaker control
- Internet browsing
What parts of a washing machine would use an embedded system?
- Program control
- Temperature sensor
- Thermostat control
- Door lock control
- Water pumps
What is meant by software?
The programs or applications that a computer can run
What is meant by Firmware?