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7 Cards in this Set
- Front
- Back
Purpose of a CPU
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'brain of the computer'
processes data decision-maker |
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Fetch - Decode - Execute
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Fetch - Places items to be fetched on the adress bus. ata travels to the CPU from main memory on the data bus.
Decode - CPU decodes the data in preparation of the next step. Each CPU has a different 'instruction set' |
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Fetch - Decode - Execute
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Fetch - Places items to be fetched on the adress bus. ata travels to the CPU from main memory on the data bus. Stored in temporary registers within itself.
Decode - CPU decodes the data in preparation of the next step. Each CPU has a different 'instruction set' Execute - The CPU carries out the instruction upon the data. |
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Parts of a CPU
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Control Unit - Controls & moniters hardware. Controls input & output. Controls the flow of data within the CPU.
Immidiate Access Store (IAS) - Holds data that is immidiately needed by the CPU. Arithmetic & Logic Unit (ALU) - Calculations are performed here (1+1=2) Logic is also done here (1<10) |
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Clock Speed
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1 Instruction performed every cycle. Measured in Hz - cycles per second.
More cycles - faster, but uses more power and gets hotter. Overclocking - modified CPU to go faster. Uses more power and gets hotter. |
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Cores
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More cores = more CPUs
Shares the load between the two. |
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Cache
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The cache is a momory storage device very close to the CPU to make it faster to store the information.
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