I noticed Mattairtech's pin definitions include PER_ATTR_DRIVE_STRONG on them. But in googling that, the only reference I find to that constant is on Mattairtech's own page. I know the Zero's specs state 7mA is the max per pin, but I also know that the SAMD21 has two different drive strengths you c…

Are the Zero's pins set to strong drive strength by default?

Jpreisler August 27, 2016, 7:41pm 4

PB03 LED_RX: OUT DRVSTR
PA27 LED_TX: OUT DRVSTR

these seem to be the only two pins with the DRVSTR register set by default

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