PVD STM32L071

[JJRR]

Dear,

I use STM32L071 powered from serial 2xAA 1.5 V battery (3 Volts). I intended to use PVD to reset mcu when the VCC is dangerously low, but the lowest threshold to activate PVD IRQ is 1.9 V. Problem is that for me is shame to reset whole MCU at 1.9 V (me device can still work at 1.9 V).

In my code I use reading and writing to EEPROM (I use lock and unlock the memory).

My question: Is necessary to reset MCU at 1.9 V ? When I do not use PVD and do not reset MCU, can it have an undesirable effect for example for EEPROM?

Best regards, Jan.

[Uwe Bonnes]

Using Brown-out detection might save you about 120 mV of battery. EEPROM handling is specified down to 1.65 V

[JJRR]

thank you.. and should I use the PVD for reset the MCU? I have no any external voltage detector to do reset. And my device can run until the batteries have enough power to run MCU, but I am not sure if it is safe..