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CPU components and operation: von Neumann architecture
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- 1What are components of Neumann-Machine?- CPU (Central Processing Unit) with CU (Control Unit) & ALU (Arithmetic Logic Unit)
- Memory Unit
- Input/Output device
- Bus system - 2What is the critical aspect of the bus system in VNR?Only one component reach the bus at one time
Collision when more then 1 components sending signal via the bus system => data will be lost if collision happens
=> slow working time - 3What does Programme Counte (PC) do?- PC points to the current instruction handled by the processor
- PC is updated tot he next instruction
- CU fetches the next instruction from the location the PC points to and prepares the execution of it by the ALU - 4What are register?- A digital memory area integrated in the CPU
- No delay by accessing
- Content can be used immediately by CU and ALU - 5How much data can the register contain?usually as many bits (8, 16, 32, 64) as the processor can handle altogether in one instruction
- 6Describe how the processor work?- CPU executes instructions in clock cycles
- Depending on the instruction, the data from one or multiple registers is taken as input and calculated during one or more cycles. Result is written back to a register
- Data is transferred between registers and main memory (or cache) in cycles as well: get new instructions and data; wirte back results
- Usually, the instructions have to be decoded by the CU before being executed by ALU - 7Control Unit (CU)- A component of CPU
- is responsible for the sequential processing of programs in the memory - 8How does CU work?- CU send the address of the current instruction to the memory
- CU receives the instruction as answer from memory
- CU perform the newly received instruction
- The cycle repeats - 9What are the components of a CPU? (from processing view)- Program counter (PC): contain the address of the current instruction (manages by CU). This will be send to memory
- Instruction register (IR): contain the instruction received from memory, which muss be performed by CU
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- Fichas sobre Sin título, creado por Linh Phan el 08/05/2018.
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- Linh Phan
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