AVR-Chat

At 05:10 PM 3/12/2004 -0800, LightYearCS wrote:
>Generally speaking you ALWAYS need bypass capacitors.  The AVR chips
>generate a lot of power supply spikes which the bypass capacitors
>"bypass" to ground.

That's not really the right way to look at it.

All micros, and most logic, have large "Spiky" current drains, when lots of 
internal gates change state.
If the supply can't provide those current demands, then the voltage changes 
more than is allowed, which may cause logic states to be misread, or other 
problems.
The bypass caps provide those large current bursts.


Otherwise, completely correct.