7618986
Description
Mind Map by Laura Ridley, updated more than 1 year ago
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Created by Laura Ridley
about 7 years ago
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The CPU
- Components of he CPU
- Arithmatic and
Logic unit(ALU)
- The ALU carries out calculations and
makes decisions on the data sent to the
processor. This is where the computer
processes data either by manipulating it or
acting upon it. It consists of two parts.
- Arithmetic part- Which does exactly
what you think it should- It performs the
calculation on the data.
- Logic part- This deals with logic and
comparisons. For example, it works out if one
value is greater, less than or equal to another.
- Arithmetic part- Which does exactly
what you think it should- It performs the
calculation on the data.
- The ALU carries out calculations and
makes decisions on the data sent to the
processor. This is where the computer
processes data either by manipulating it or
acting upon it. It consists of two parts.
- Control unit (CU
- Registers
- MAR
- MDR
- Program Counter
- Accumulator
- MAR
- Arithmatic and
Logic unit(ALU)
- Factors that affect the performance of the
CPU
- Number of cores
- Single core
- Quad core
- Dual core
- Single core
- Type of processor
- CISC
- RISC
- CISC
- Clock Speed
- Number of cores
- Fetch, Decode, Execute
- Fetch
- Data is fetched from the MDR register
- It is quicker to access data stored in the
registers than to access main memory RAM
- BUT... If the data is not in main
memory it needs to request data
from secondary storage which is
much slower
- BUT... If the data is not in main
memory it needs to request data
from secondary storage which is
much slower
- It is quicker to access data stored in the
registers than to access main memory RAM
- Data is fetched from the MDR register
- Decode
- Execute
- Fetch
- The purpose of the CPU is to process data
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