GPIO timing

dan7 · ‎2006-07-20

Posted on July 20, 2006 at 12:49

GPIO timing

dan7 · ‎2011-05-17

Posted on May 17, 2011 at 09:30

How many clock cycles take GPIO operations: OUT and IN?

For example what maximal frequency I can have on the pin just toggling

it 1 and 0?

Comparing the Phlips ARM7, running at 60MHz gives something

about 3.5MHz maximum.

kais · ‎2011-05-17

Posted on May 17, 2011 at 09:30

Hi vdaniel,

I have tested the GPIO toggling frequency under a 25MHZ CPU frequency and I have seen that I can increase the frequency, when I optimize well the code and use the buffering Access.

In my case of trial I have reached 2.1MHZ.

Regards .