What is another name for the processor, and what is its role in a computer?
The processor, also known as the CPU (Central Processing Unit), is the “brain” of the computer, responsible for executing program instructions.
How does the speed of the processor impact computer performance?
The faster and more powerful the processor (measured in GHz), the better the computer’s overall performance.
Name some important features to consider in a processor.
- CPU Clock Speed,
- Cores,
- Cache,
- Word Length.
Define CPU Clock Speed and its significance.
- Is measured in GHz, which indicates how many cycles per second the processor can execute.
- Higher clock speeds allow the CPU to handle more instructions in each time period
What is the role of Cores in a CPU?
- Cores are individual processing units within a CPU.
- More cores enable the processor to handle multiple tasks simultaneously, improving overall performance.
What is the purpose of Cache in a processor?
Cache is a type of memory within the processor that stores frequently used data, making it quickly accessible to the CPU.
Explain Word Length in the context of processors.
- Word Length refers to the number of bits a processor can process at once.
- A larger word length allows the CPU to handle more data in a single operation, enhancing performance in specific tasks.
Name two common CPU architectures and their primary uses.
- x86 architecture (for personal computers & servers)
- ARM architecture (designed for mobile devices, tablets, and some laptops and more energy efficient than x86, though it is generally less powerful).
Describe the uses of a Microprocessor.
- computers,
- smartphones,
- vehicle speed controllers,
- traffic lights,
- military applications.
Describe the characteristics of a microprocessor.
- Consists of a CPU
- Uses an external bus to interface with RAM, ROM and other peripherals
- Expensive and complicated, with many instructions to process
Describe the features of a microprocessor.
- Provides inbuilt monitor/ debugger program with interrupt capability
- Offers parallel I/O (Input/ Output)
- Instruction cycle times
- External memory interface
What are the uses of a microcontroller?
- Mobile phones
- Vehicles
- CD/DVD players
- Washing machines
- Security alarms
- Lighting systems
- Fire detection systems
- Keyboard controllers
- Watches
- Cameras
- Microwave ovens
Describe the characteristics of a microcontroller.
- Consists of CPU, Memory and I/O integrated on one chip.
- Uses an internal controlling bus
- Inexpensive and straightforward, with fewer instructions to process than other types of processors
What are the features of a microcontroller?
- Contains a processor reset
- Program and variable memory (RAM) I/O pins
- Device clocking central processor
- Instruction cycle timers
What is the use of an embedded processor?
To control the electrical and mechanical functions
What are the characteristics of an embedded processors?
- Requires more resources such as RAM and registers to control a system,
- Is used to create an automated device as well as controlling devices using a microcontroller
- Requires external components to function, e.g. peripheral interfaces
- Often a component within a microcontroller
What are the features of an embedded processor?
- Simple design
- Limited computational power
- Limited I/O capabilities
- Minimal power requirements
What are the uses of a digital signal processor (DSP)?
- Measuring
- Filtering
- Compressing digital/ analogue signals such as voice, audio, video, temperature, pressure or position and manipulates them mathematically.
What are the examples of compressing digital/ analogue signals?
- Speech processing
- Image processing
- Medical processing
- Biometric processing
- Seismology
- Radar
What are the characteristics of a Digital Signal processor? (DSP)?
- Processes digitized signals in real-time, manipulates signals such as voice, audio, video, etc.
- Used in applications like speech processing, image processing, medical processing, and seismology.
- Can quickly perform mathematical calculations.
What signals does a Digital Signal Processor (DSP) process in real time?
DSP processes digitized signals from the real-world, including voice, video, temperature, audio, position, and pressure.
What is the purpose of mathematically manipulating signals in a DSP?
Signals are mathematically manipulated to convert them into another form or to display information.
How does DSP contribute to the compatibility of digital TVs with different video standards?
Digital TVs use DSP to ensure compatibility with various video standards such as VGA, SVGA, SXGA, and UXGA.
What are some applications where DSP is commonly used?
DSP is used in cell phones, digital TVs, sound cards, and other devices that require signal processing
