Zusammenfassung der Ressource
Computing
- Logic gates
- The output is always the opposite of the input. The
output is only ever 1 when the input is 0.
- Both of the inputs have to be 1 for the output to be one.
- The output is only 1 when either of the inputs are 1. There is only ever a 0 when both of the inputs are 0.
- AND GATE
- OR GATE
- NOT GATE
- Why do computers use binary?
- It is the universal computer language
- It is a definite yes or no
- There can be no maybes
- Has a
charge or
no charge
- so logic
gates turn
them off
or on
- Fetch De-execute cycle
- The CPU fetches the data from the RAM
- Decode the data so that the ALU can
understand the binary code, each CPU has
a set of instructions which can understand
the binary in different ways.
- The computer then carries out the process
and resets the ALU and CPU for the next
cycle
- Storage Devices
- Flash
- Non-volatile
- No moving parts
- Solid state
- Universal serial bus - USB
- Magnetic
- Non-Volatile
- All data is deleted when the
power to the storage device is
stopped
- Large storage capacity
- RAM (Random Access Memory)
- Optical
- Non-volatile
- Is read by a laser
- DVD
- Input and Output devices
- Input devices allow information to go into the computer
- EG/ Keyboard
- Output devices allow information to be displayed to humans
- EG/ Monitor