ZHCSIT2F September 2010 – September 2018 MSP430F5304 , MSP430F5308 , MSP430F5309 , MSP430F5310
PRODUCTION DATA.
The integrated 3.3-V power system incorporates an integrated 3.3-V LDO regulator that allows the entire microcontroller to be powered from nominal 5-V LDOI when it is made available for the system. Alternatively, the power system can supply power only to other components within the system, or it can be unused altogether. The Port U Pins (PU.0 and PU.1) function as general-purpose high-current I/O pins. These pins must be configured together as either both inputs or both outputs. Port U is supplied by the LDOO rail. If the 3.3-V LDO is not being used in the system (disabled), the LDOO pin can be supplied externally.