9 9. Module: GPIO

When a GPIO is configured as an output and driven low, if an external signal sinks more than 8.7 mA of current into a 4x pin, or 11.6 mA on an 8x pin, the pin may become damaged. Similarly, when a GPIO is configured as an output and driven high, if an external signal sources more than 5.8 mA of current from a 4x pin, the pin may become damaged. 8x pins are not affected by this condition.
Workaround

If an I/O is configured as an output and driven high or low, limit the current to or from the pin with a series resistor, or avoid direct pin contention scenarios.

Affected Silicon Revisions
A0
X