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AFE4490: How to set timer control registers

Cesar Abascal
Prodigy 90 points
Part Number: AFE4490

Hello guys,

I started to develop somethings with my AFE4490.

I can read and write any register, and I could measure something using the datasheet exemple to (PRF) = 500Hz and duty cycle = 25% on page 36.

But now, I'm trying to use 250Hz. For this, I just need to change PRPCOUNT reg to half of the example, or I need to change the other registers too.
If I'll need to change then, there is a software or algorithm to do this in the write way?

Thanks for your help.

  • 0
    TI__Genius 12555 points
    Hi Cesar,

    Yes, you have to change PRPCOUNT as well as other timing registers.
    You can use the GUI of AFE490EVM to generate the register setting for the given PRF.

    Regards,
    Prabin
  • 0 in reply to Prabin Yadav
    Prodigy 90 points
    Woooww. That's really nice. :)



    Thanks for your help.

    In fact, yesterday I found that answer, but I didn't know that exist an GUI for this. I was writing my own python register generate. hehe



    Did you know if exist some research talking about the best frequency sample for use the AFE on heart rate, heart rate variation and blood oxygenation?



    Thanks again.