ZHCSEA0E October 2015 – August 2019 MSP430FR2433
The PMM includes an integrated voltage regulator that supplies the core voltage to the device. The PMM also includes supply voltage supervisor (SVS) and brownout protection. The brownout reset circuit (BOR) is implemented to provide the proper internal reset signal to the device during power on and power off. The SVS circuitry detects if the supply voltage drops below a user-selectable safe level. SVS circuitry is available on the primary supply.
The device contains two on-chip reference: 1.5 V for internal reference and 1.2 V for external reference.
The 1.5-V reference is internally connected to ADC channel 13. DVCC is internally connected to ADC channel 15. When DVCC is set as the reference voltage for ADC conversion, the DVCC can be easily represent as Equation 1 by using ADC sampling 1.5-V reference without any external components support.
A 1.2-V reference voltage can be buffered and output to P1.4/MCLK/TCK/A4/VREF+, when EXTREFEN = 1 in the PMMCTL1 register. ADC channel 4 can also be selected to monitor this voltage. For more detailed information, see the MP430FR4xx and MP430FR2xx Family User's Guide.