Asynchronous SCLK when using SPI

gavin2 · ‎2012-07-18

Posted on July 18, 2012 at 13:41

I am having some problems in that the SCLK signal for my SPI (when using either SP1 or SPI2) appears to be incorrect. Although the period is stable throughout and as I would expect, the clock pulse itself is non symmetrical.

I dont have any idea as to what could be causing this? Does anyone have any thoughts?

Thanks in advance

Tesla DeLorean · ‎2012-07-18

Posted on July 18, 2012 at 14:07

Asynchronous != Asymmetrical

Without seeing a schematic or the configuration, I'm going to assume you have some odd loading on the pin, or the slave device is driving.

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gavin2 · ‎2012-07-18

Posted on July 18, 2012 at 14:46

Sorry, yes 'asymmetrical' is what I meant. Just being silly there.

Thanks for the tip. I will double check the loading, etc before posting any code or waveforms.

Regards