what is system bus what is it's function in the working of cp
Answers
Answer:
The system bus connects the CPU, memory, and the input/output devices. It carries data, address, and control information. The speed of the system bus is an important part of the performance of a computer system, just like the speed of the CPU and the size of the memory.
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Answer:
A system bus is a single computer bus that connects the major components of a computer system, combining the functions of a data bus to carry information, an address bus to determine where it should be sent, and a control bus to determine its operation.
There are three types of buses.
Address bus – It is a group of conducting wires which carries address only.Address bus is unidirectional because data flow in one direction, from microprocessor to memory or from microprocessor to Input/output devices (That is, Out of Microprocessor).
Data bus – It is a group of conducting wires which carries Data only.Data bus is bidirectional because data flow in both directions, from microprocessor to memory or Input/Output devices and from memory or Input/Output devices to microprocessor.
Control bus –
It is a group of conducting wires, which is used to generate timing and control signals to control all the associated peripherals, microprocessor uses control bus to process data, that is what to do with selected memory location. Some control signals are:
Memory read Memory write I/O read I/O Write Opcode fetch
CPU has four basic functions to perform a task:
Fetch. The first step of a CPU is to fetch instructions from the program memory. ...
Decode. After fetching information CPU will determine what to do with that data next, this step is the decode step. ...
Execute. ...
Arithmetic Logic Unit (ALU) ...
Control Unit (CU)
Explanation: