Parts and Characteristics of the CPU
Terms in this set (11)
Central Processing Unit; the brain of the computer.
Arithmetic and Logic Unit - does all mathematical calculations and makes all logical decisions
The Control Unit. It monitors and manages what is happening elsewhere, determining the movement of data but also ensuring that the input and output are being processed properly by the F-D-E cycle. For example, the CU is responsible for sending the input to the RAM (long term memory) before the F-D-E cycle can be completed. It also maintains and sends out clock signals to synchronise the running of the F-D-E cycle.
A smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory locations.
Memory Access Register. Holds the memory location of data that needs to be accessed.
Memory Data Register. Stores the data being transferred to and from the immediate access storage.
Inside the ALU.
Accumulator - a register that stores the results of calculations carried out by the ALU.
Inside the ALU.
Program counter, contains the address of the next instruction
Dictates how many instructions the CPU can process each second
A part of the main store between the central processor and the rest of the memory. It has extremely fast access, so sections of a program and its associated data are copied there to take advantage of its short fetch cycle. The larger the size of the cache the more that can be copied and stored here without having to go back to slower main memory (RAM), this has a significant impact on the speed of processing.
Number of Cores
More cores = more instructions at one time