Current Limits

[Sprite]

And as a bonus hard-to-find figure, the internal pull-up and pull-down resistors are 45kOhms each.

Note that these are silicon resistors, so that value of 45KOhm has some extremely large error bars and probably varies a bit with temperature, supply voltage etc.

[DIYTinkerer]

Hi when you say

This domain can SOURCE 40mA and SINK up to 28mA on STRENGTH 3

do you mean per pin or a maximum load across all pins that the power domain supplies?
Thanks.

[Sprite]

Hi when you say

This domain can SOURCE 40mA and SINK up to 28mA on STRENGTH 3

do you mean per pin or a maximum load across all pins that the power domain supplies?
Thanks.

That's per pin.