Computer is a machine that is capable of accepting data , processing it and displaying the output.The work of computer are:-
* Takes input data from computer.
* Process data from processing device.
* Gives the output.
All the calculations are performed by CPU(Central processing Unit). CPU is also known as the heart of the system. Microprocessor which is the heart of the computer system.Microprocessor accept input from input devices such as keyboard, mouse, scanner,in the form of data and instructions.
Working of the Micro-processor:-
The microprocessor requires information to process data.processor retrieves this information from the external memory such as
RAM(Random access memory).The retrieves of data from
RAM(Random Access Memory) is time consuming and it slow down the process.Now, the latest micro-processor using L1(level 1) cache built into the processor.The processor stores required information in the cache.When processor finds required data or information in the cache , then it's called
Cache hit.When processor doesn't find required information in the cache , then it's called
Cache miss. When information is not available in cache then it search in
RAM(Random Access Memory).
Speed of the Micro-processor:-
The speed of micro-processor depends on various factors like:-
- The number of instructions it processes
- The bandwidth
- The Clock speed
An
instruction is a command that micro-processor executes.The
bandwidth specifies the no. of binary digits that micro-microprocessor can processes an instruction.The
clock speed specifies the speed at which the micro-processor processes an instruction.
The speed of microprocessor varies from 66 MHZ to 3.8 GHZ.
The speed of the processor depends on the no. of the transistor built into the processor.We use transistor to boost the data signals on the processor. The advantage in the technology field reduces the size of the transistor & have increased the processing speed of the processor.
