VDDIO Monitoring: The I/O BOR is
supported for application use, so an external supervisor is not required to monitor
the I/O rail.
VDD Monitoring:
- VDD supplied from the internal VREG: The VDD supply is derived from the
VDDIO supply. The VREG is designed in such a way that a valid VDDIO
supply(monitored by the IO BOR) implies a valid VDD supply.
- VDD supplied from an external supply: The VDD POR is not supported for
application use. If VDD monitoring is required by the application, an
external supervisor can be used to monitor the VDD rail.
Note: The use of an external
supervisor with the internal VREG is not supported.If VDD monitoring is required by the application, a package with a VREGENZ
pin must be used to power VDD externally.