The I/O buffers for the MIO pins used to interface to the boot device are configured by the RCU BootROM with these attributes:
- Default drive strength (8 mA)
- Default slew rate (slow)
- Default weak pull-ups (enabled)
- Enables the Schmitt trigger
- Disables the 3-state override
Note: The MIO pins that are not used for the boot interface are not configured
and remain at their default reset settings.