1.1 system architecture Flashcards
What is a CPU
A Central Processing Unit
What is the MAR
A Memory address register
What is the MDR
A memory data register
What happens in the fetch stage
Fetches data from main memory to the CPU
What is the PC
Program Counter
What does Hertz measure
Fetch-execute cycles per second
How many levels of cache are there
3
In simple terms, what is a core
A complete replica of the CPU
by how much does the PC increment by each fetch-execute cycle
1
what does ALU stand for
Arithmetic Logic Unit
the prefix “giga-“ means
billion
give an example of a fixed program computer
a calculator
true or false? data is held in hexadecimal form
false
is a touchscreen input or output
both
what is a microcontroller
a CPU with an integrated memory
give 3 examples of embedded systems
hospital equipment, domestic appliances, and traffic lights
what is the function of the CPU
The CPU performs basic arithmetic, logic, controlling, and input/output operations specified by the instructions in the program.
what does the data bus do
is carries data around the system
how many registers are there
4
what is overclocking
it is where the computer carries out fetch-execute cycles faster than it should
