I am encountering with a following problem in MCU STM32L432B.1. When the MCU enter to low-power mode (Stop 2) ones does not wake up while VDD is low than 2.1V, instead of it turns to mode with power consumption more 10ma. 2.When operation of the MCU...

I am working with STM32L432KC in range VDD and VDDA 1.8-3.6V.I have read the reference manual. It doesn't say anything about how to apply the internal reference 1.2V. as a reference of ADC and DAC?