I currently have a rechargeable battery application using the msp430f2274 and the BQ24072 power path management. I need to move to the msp430f5504 for future firmware upgrades. What I am trying to figure out is how to manage the Vbus. The charging circuit through the BQ24072 and voltage regulator limits the voltage to 3.3V, which then runs to the current system(msp430f2274). It appears that the msp430f5504 USB Vbus requires at minimum 3.76V for proper operation. Is it possible to use the USB functionality for firmware updates at 3.3V?