Revisions Affected

Rev C

Details

When disabling the power of a peripheral by setting the PWREN register to 0, the peripheral’s registers may appear to retain data values if read. Reading or writing to the registers when PWREN is 0 has no affect as the peripheral has no effect.

The following peripherals are affected: comparator (COMP), operational amplifier (OPA), TimerA, TimerG, general-purpose input/output (GPIO), and windowed watchdog timer (WWDT).

Workaround

When the PWREN register of the peripheral is set to 0, the values of the associated registers should be disregarded or considered invalid.