459721
Description
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
- The output is always the opposite of the input. The
output is only ever 1 when the input is 0.
- 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
- It is the universal computer language
- 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
- The CPU fetches the data from the RAM
- Storage Devices
- Flash
- Non-volatile
- No moving parts
- Solid state
- Universal serial bus - USB
- Non-volatile
- Magnetic
- Non-Volatile
- All data is deleted when the
power to the storage device is
stopped
- Large storage capacity
- RAM (Random Access Memory)
- Non-Volatile
- Optical
- Non-volatile
- Is read by a laser
- DVD
- Non-volatile
- Flash
- Input and Output devices
- Input devices allow information to go into the computer
- EG/ Keyboard
- EG/ Keyboard
- Output devices allow information to be displayed to humans
- EG/ Monitor
- EG/ Monitor
- Input devices allow information to go into the computer
Media attachments
4 comments
over 10 years ago
this is top notch
almost 11 years ago
Makes perfect sense now :-)
almost 11 years ago
Thanks very much fc, I appreciate it.
about 11 years ago
a couple of mistakes in here. Magnetic is non-volatile. The only volatile storage is RAM and that's not the same kind of storage as magnetic, USB, optical etc. Also for why computers use binary, most exam boards will be looking for an answer along the lines of "because they have wires that can carry charge or no charge, this is represented by 1 (charge) or 0 (no charge). These can then be used in logic gates which act as switches to carry out operations like addition or comparison". tough to fit into a mind map but i thought the extra clarification might help.
fc
Want to create your own Mind Maps for free with GoConqr? Learn more.