System Architecture 0.0 / 5 ? ComputingComputer systemsGCSEOCR Created by: PollyMunroCreated on: 13-02-19 17:35 CPU The part of the processor that processes data and executes instructions 1 of 11 MAR A CPU register that holds the memory address about to be used by the CPU 2 of 11 MDR A CPU register that holds the actual data or instruction 3 of 11 PC Holds the memory address of the instruction for each cycle 4 of 11 Accumulator Stores the immediate result of the calculation in the ALU 5 of 11 ALU Where the arithmetic and boolean operators are carried out 6 of 11 CU It controls the flow of data in and out of the CPU, and executes instructions by following the fetch-decode-execute cycle 7 of 11 Cache Very fast memory that stores regularly used data 8 of 11 Clock Speed The amount of instructions a single processor can execute per second 9 of 11 Cores Processing units found inside the CPU 10 of 11 Embedded System A computer inside a larger system 11 of 11
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