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IMX28 reset due to VDDXTAL

Question asked by djcatter on Sep 24, 2013
Latest reply on Sep 25, 2013 by Artur Petukhov

Based a design off of the reference board. We used the reference design power switch circuit to get us the two events. One is a button connected straight to VDDXTAL, the other is to the a 3.3V supply through a 10k resistor. We found an edge case where both events can occur and over drive VDDXTAL sometimes causing a reset. Yellow is the PSWITCH, pink is the VDDXTAL:

 

print_27.bmp
Now hindsight, I should have had a diode in place to block the 3.3V to the VDDXTAL. What I would like to know is where is the reset occuring? I have not been able to find it in the documentation where this reset is caused.

 

Thanks,

 

Derek

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