I need to know the maximum current you can 'sink' through the GPIO pins on the iMXRT1021.
It is not in any of the datasheets.
I need to know per-pin and total currents.
(We have a group of LED's which are powered directly from an LDO, and grounded via the Processor. We need to check that the LED current does not exceed the pin rating, and that if we have all four LED's on, we don't exceed the part rating).