processor components

Question 1

arithmetic logic unit

Answer 1

the alu completes all of the arithmetical and logical operations.includes all mathematical operations.Logical operations include boolean and logic operations such as And ,or ,not ,and and xor

Question 2

control unit

Answer 2

The control units is the component of the processor which directs the operation of the cpu.it has the following jobs:

• managing the flow of data between the cpu and other devices
• accepting the next instruction
• decoding instructions
• storing the resulting data back in memory

Question 3

registers

Answer 3

registers are the small memory cells that operate at a very high speed , used to temporarily store data and all arithmetic ,logical and shift operations

Question 4

program counter (register )
accumulator(register)
memory address register

Answer 4

purpose : holds address of the next instruction to be executed

purpose: stores results from calculations
purpose: holds the address of a location that is to be read or written to

Question 5

memory data register

current instruction register

Answer 5

purpose: temporarily stores data that has been read or data that needs to be written
purpose: holds the current instruction being executed ,divided into operand and opcode

Question 6

bus

Answer 6

Buses are a set of parallel wires which connect two or more components inside the CPU.
There are three buses in the CPU: data bus, control bus, and address bus.

Question 7

data bus

Answer 7

This is a bi-directional bus (meaning bits can be carried in both directions). This is used for
transporting data and instructions between components.

Question 8

address bus

Answer 8

This is the bus used to transmit the memory addresses specifying where data is to be sent to or retrieved from.

Question 9

control bus

Answer 9

This is a bi-directional bus used to transmit control signals between internal and external
components.

Question 10

control signals include

Answer 10

• Bus request: shows that a device is requesting the use of the data bus
• Bus grant: shows that the CPU has granted access to the data bus
• Memory write: data is written into the addressed location using this bus
• Memory read: data is read from a specific location to be placed onto the data bus,
• Interrupt request: shows that a device is requesting access to the CPU
• Clock: used to synchronise operations