CPU Components Flashcards

OCR GCSE J277 Computer Science specification

CPU

The central processing unit that executes instructions and processes data.

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Terms in this set (10)

1

CPU

The central processing unit that executes instructions and processes data.

2

ALU

The arithmetic logic unit performs arithmetic operations (e.g., addition) and logical operations (e.g., AND, OR, NOT).

3

CU

The control unit coordinates the activities of the CPU, directing the flow of data and instructions.

4

Cache

A small, fast memory located close to the CPU that stores frequently used data and instructions.

5

Registers

Very fast storage locations within the CPU used to temporarily hold data and instructions.

6

MAR

The memory address register holds the address of the memory location to be accessed.

7

MDR

The memory data register holds the data that has been read from or is to be written to memory.

8

Program Counter

A register that holds the address of the next instruction to be executed.

9

Accumulator

A register that stores intermediate results of calculations performed by the ALU.

10

Von Neumann Architecture

A design model for a computer where instructions and data share the same memory and are accessed via buses.

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