nrf51822 PAN #9 confusion

[Philip Freidin]

In the document nRF51822-PAN v2.4.pdf, PAN #9 says that OUTINIT doesn't work,

"Initial value for GPIOTE output after configuration is undefined"

and example workaround code is given.

Looking at nrf_gpiote.h in the SDK V7.0.1 describes "OUTINIT PAN" (no number) and describes the problem as

"a glitch happens on the GPIO if the GPIO in question is already assigned to GPIOTE and the pin is in the correct state in GPIOTE but not in the OUT register."

The work around code is similar but not identical to the code in the PAN document.

Are there really 2 different issues? are both fixed in G0 chips.

Thanks

[Stefan Birnir Sverrisson]

Hi Philip

Thank you for your observation.

At some point, there was found a bug in the provided workaround provided in the PAN. The fix was included in the SDK but the PAN was not updated with the same fix. I have reported the issue as a bug in PAN documentation.

[Philip Freidin]

For others who read this article, but might not see another one between me and Stefan:

So the SDK 7.0.1 is the most current solution for PAN bug #9, and should be used with C0 chips rather than what is in the PAN v2.4 document. Per your answer to another of my questions, for G0 chips, the bug has been fixed in silicon, and the workaround code that is in the SDK is not needed, but is harmless.

Thanks.