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Replying to @josecastillo

The differences:
• A3 is PA06 instead of PA04. PA06 wasn’t broken out on the SAM D21 Feather, but on the L22 it’s an opamp pin, so we want it.
• AREF is PA04 instead of PA03, again, because PA04 is an opamp pin and PA03 isn’t. With this… https://mastodon.social/@joeycastillo/109250180107512798

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