Hi,
Does anyone know how quickly the digital pins on Arduino Uno can switch between HIGH and LOW state? Is this something I can tell from the docs and/or how do I go about testing?
Thanks in advance,
LongTom
knut_ny:
Ready, Set, Oscillate! The Fastest Way to Change Arduino Pins « The Mind of Bill Porter
Tremendous, thank you!
3.6nS typical rise & fall times, depending on the load being driven.
The only place you will see a number is in the SPI section of the datasheet.
29.6, Table 29.18
Need a high speed oscilloscope to see the edges.
My 200 MHz digital scope with 1.75nS Rise Times and 2 GSample/Sec would show it pretty well I think.
Fastest IO you can do is 8 MHz clock SPI transfers, last time I tested the clock line was looking pretty good going from a 1284 to a buffer chip on another board via a 6" wire.