SLAA494B May 2011 – September 2023 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253
The simple capacitive power supply does not provide enough current for the MSP430F6638 to drive RF transceivers. Therefore, a switching-based power supply is required. An additional power supply module on the board provides 3.3-V dc from the ac mains of 110-V or 220-V ac. The internal circuitry for this module is not provided with this application report.