1.1 Flashcards
(20 cards)
what the cpu does
fetches instructions from ram
decodes the instruction
executes the instruction
control unit
sends control signals to synchronise execution
decodes instructions
alu
performs logical and mathematical calcs
accumulator
stores result (in alu)
registers
small areas of very fast memory
execute instructions
cpu cache memory
stores instructions
quicker for cpu to fetch instructions than ram
registers store
data
data addresses
program counter
stores address of next instruction to be fetched
memory address register
stores address of where to fetch or save data
memory data register & then instruction register
stores data which has been fetched
accumulator
stores result (in alu)
clock speed
the speed of fde cycles
hertz
cycles per second
faster clock speed =
can run programs quicker
higher cache capacity
can fetch instructions quicker
may be inefficient if memory is badly made
more cores =
can run more programs or instructions simultaneously
a core is
processing unit that can execute instructions
embedded system
computer system built into another device
(dis)advantages of an embedded system
designed for its function so efficient
cheaper
but can only do specific function
general purpose system
multiple functions
expensive
