Purpose of the CPU is to fetch and execute instructions stored in memory
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What is an embedded system?
A device which has a built in processor and is programmed to do a specific task
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Define clock speed
The number of instructions that can be carried out usually measured in hertz (per second)
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Define cache size
Fast access memory that is faster to access than RAM. Stores frequently used instructions
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What are cores?
Individual processors within the CPU. Can multitask more.
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What is the Von Neumann Architecture?
When the computer programs/instructions and the data are stored in the same memory
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What is a register?
A register is fast dedicated memory location within the CPU
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What is the memory address register (MAR)?
A register in the CPU that holds the memory address of the current instruction, and then the data that it uses, so that these can be fetched from memory
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What is the memory data register (MDR)?
A register which holds the actual instruction, and then the data that has been fetched from memory
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What is the program counter (PC)?
A register that holds the address of the next instruction to be executed
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What is the current instruction register (CIR)?
A register that holds the current instruction being executed
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What is the accumulator?
A register that holds the result of an instruction before it is transferred to memory
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What is the arithmetic logic unit (ALU)?
A part of the CPU which carries out arithmetic and logic instructions
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What is the control unit?
A part of the CPU that coordinates the CPU activities and decodes the instruction to be executed
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Other cards in this set
Card 2
Front
What is an embedded system?
Back
A device which has a built in processor and is programmed to do a specific task
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