SLAS983A May 2014 – September 2018 MSP430F67451A , MSP430F67461A , MSP430F67471A , MSP430F67481A , MSP430F67491A , MSP430F67651A , MSP430F67661A , MSP430F67671A , MSP430F67681A , MSP430F67691A , MSP430F67751A , MSP430F67761A , MSP430F67771A , MSP430F67781A , MSP430F67791A
The backup subsystem operates on a dedicated power supply AUXVCC3. This subsystem includes low-frequency oscillator, real-time clock module, and backup RAM. The functionality of the 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 user.