On my F28035, I'm noticing that when I do a FLASH Erase operation on an entire sector, some GPIOs (i.e. SCIA-TX) are pulled down from 3.3V to about 2.0V during the FLASH operation (my 3.3V supply stays solid). This has some unintended side effects (holding my UART bluetooth module connected to SCIA in reset).
These GPIOs have internal pullups disabled (because they are pulled up externally). My external pullup may be too weak, I might use a stronger pullup resistor, or consider using the internal pullup.
Is this normal? Does the FLASH operation take up that much power? Enough to bring a GPIO down?
