1. Common CPU components
1.1. ALU (Arithmetic Logic Unit)
1.1.1. performs arithmetic and bitwise operations on integer binary numbers.
1.2. CU (Control Unit)
1.2.1. directs the operation of the processor.
1.3. Cache
1.3.1. stores data so that future requests for that data can be served faster.
2. Embedded systems
2.1. Purpose of embedded systems
2.1.1. To control the device and to allow a user to interact with it.
2.2. Examples of embedded systems
2.2.1. -central heating systems. -engine management systems in -vehicles. -domestic appliances, such as TVs and digital -phones. -digital watches. -electronic calculators. -GPS systems. -fitness trackers.
3. Von Neumann
3.1. MAR (Memory Address Register)
3.1.1. holds the address of the current instruction that is to be fetched from memory, or the address in memory to which data is to be transferred.
3.2. MDR (Memory Data Register)
3.2.1. holds the contents found at the address held in the MAR, or data which is to be transferred to primary memory.
3.3. Program Counter
3.3.1. a register in a computer processor that contains the address (location) of the instruction being executed at the current time.
3.4. Accumulator
3.4.1. holds the data being processed and the results of processing.