Computer-science_A-level_Cie
-
computers-and-components6 主题
-
logic-gates-and-logic-circuits2 主题
-
central-processing-unit-cpu-architecture6 主题
-
assembly-language-4 主题
-
bit-manipulation1 主题
-
operating-systems3 主题
-
language-translators2 主题
-
data-security3 主题
-
data-integrity1 主题
-
ethics-and-ownership3 主题
-
database-concepts3 主题
-
database-management-systems-dbms-1 主题
-
data-definition-language-ddl-and-data-manipulation-language-dml1 主题
-
computational-thinking-skills1 主题
-
algorithms14 主题
-
data-types-and-records2 主题
-
arrays2 主题
-
files1 主题
-
introduction-to-abstract-data-types-adt1 主题
-
programming-basics1 主题
-
constructs2 主题
-
structured-programming1 主题
-
program-development-life-cycle2 主题
-
program-design-2 主题
-
program-testing-and-maintenance3 主题
-
user-defined-data-types1 主题
-
file-organisation-and-access-3 主题
-
floating-point-numbers-representation-and-manipulation3 主题
-
protocols2 主题
-
circuit-switching-packet-switching1 主题
-
processors-parallel-processing-and-virtual-machines5 主题
-
boolean-algebra-and-logic-circuits4 主题
-
purposes-of-an-operating-system-os3 主题
-
translation-software3 主题
-
encryption-encryption-protocols-and-digital-certificates3 主题
-
artificial-intelligence-ai4 主题
-
recursion1 主题
-
programming-paradigms4 主题
-
object-oriented-programming7 主题
-
file-processing-and-exception-handling2 主题
-
data-representation5 主题
-
multimedia3 主题
-
compression2 主题
-
networks-and-the-internet11 主题
components-of-the-cpu-
Components of the CPU
What is the CPU?
-
The CPU is responsible for processing all data within the computer
-
It is made up of a number of components including:
-
Arithmetic and Logic Unit (ALU)
-
Control Unit (CU)
-
System clock
-
Immediate Access Store (IAS)
-
Buses
-
|
Component |
Full name |
Purpose / function |
|---|---|---|
|
ALU |
Arithmetic Logic Unit |
Performs calculations (e.g. add, subtract) and logic operations (e.g. AND, OR) |
|
CU |
Control Unit |
Manages and controls the execution of instructions and directs data flow |
|
System Clock |
– |
Sends out regular pulses to synchronise all CPU operations |
|
IAS |
Immediate Access Store |
Main memory where instructions and data needed by the CPU are temporarily stored |
Buses
-
Components within the CPU and wider computer system are connected by buses
-
A bus is a set of parallel wires through which data/signals are transmitted from one component to another
-
There are 3 types of bus:
-
Address – unidirectional, carries location data (addresses), data is written to/read from
-
Data – bidirectional, carries data or instructions
-
Control – bidirectional, carries commands and control signals to tell components when they should be receiving reads or writes etc..
-
Responses