1.1 Flashcards
What is the purpose of the CPU?
The purpose of the CPU is to fetch, decode and execute instructions.
FDE cycle
PC holds adress of next instruction
Contents of PC copied into MAR
PC increments and loads the next instruction into the PC
The instructions or data held in the address pointed at by the MAR are loaded into the MDR
Contents of MDR are copied into CIR
CU decodes instruction held in CIR
If logic or mathematical done by ALU, otherwise executed by CU
Stored in ACC
What are the four key components of the CPU?
The four key components of the CPU are:
Arithmetic Logic Unit (ALU)
Control Unit (CU)
Cache
Registers
What is the function of the Control Unit (CU)?
Decodes instuctions, executes them, controls the movement of data and communicates with hardware
What is the Von Neumann architecture?
The Von Neumann architecture is a design of the CPU proposed by John Von Neumann, which outlines how the computer memory, input/output devices and processor all work together.
Name the four main registers in the Von Neumann architecture.
The four main registers are:
Program Counter (PC)
Memory Address Register (MAR)
Memory Data Register (MDR)
Accumulator (ACC)
True or False?
The Von Neumann Architecture consists of 5 main registers.
False.
The Von Neumann Architecture consists of 4 main registers: Program Counter, Memory Address Register, Memory Data Register, and Accumulator.
Define embedded system.
An embedded system is a computer system with a single function, inside a larger mechanical unit.
What are the three key properties of an embedded system?
The three key properties of an embedded system are:
small size
use less power than general-purpose computers
lower cost
why is a fridge not an embedded system
While a fridge has a single main function, it does not contain a CPU, so it is not considered an embedded system.
