JAJSG92D December 2011 – September 2018 MSP430F6720 , MSP430F6721 , MSP430F6723 , MSP430F6724 , MSP430F6725 , MSP430F6726 , MSP430F6730 , MSP430F6731 , MSP430F6733 , MSP430F6734 , MSP430F6735 , MSP430F6736
The backup subsystem operates on a dedicated power supply, AUXVCC3. This subsystem includes low-frequency oscillator (XT1), RTC module, and backup RAM. The functionality of backup subsystem is retained during LPM3.5. The backup subsystem module registers cannot be accessed by CPU when the high-side SVS is disabled by the user. Keep the high-side SVS enabled (SVSHMD = 1 and SVSMHACE = 0) to turn off the low-frequency oscillator (XT1) in LPM4.