Reset Pin -> 3.3V?

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Mandel
 
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Reset Pin -> 3.3V?

Post by Mandel »

Hello :)

In the past, I have observed several times that an ItsyBitsy M0 was reset just because I accidentally touched the reset pin (the pin, not the button!).

Is it advisable to put the reset pin to 3.3V via a pull up resistor (10 kOhm?)? Or did the ItsyBitsy I used have some damage?

Thanks for your help!

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adafruit_support_bill
 
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Re: Reset Pin -> 3.3V?

Post by adafruit_support_bill »

The reset pin has a relatively weak internal pullup (~100K). An external pullup in parallel with that should make it less susceptible to interference.

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dastels
 
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Re: Reset Pin -> 3.3V?

Post by dastels »

That could be EMF picked up by your body that caused the reset to go low enough to trigger (that's how capcitive touch works) or it could be static from your finger. There would be pullup circuitry in the SAMD21, but if this is a persistent problem in your environment (noisy EMF or staticy) you could add an external/additional pullup. Yes, 10K would do nicely.

Dave

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