VDDIO Monitoring: The I/O BOR feature
can be used for I/O rail monitoring as long as it meets the application requirement.
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.