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MVeen.1 · 2024-03-28

From what I understand, a STM32L433RCT3 MCU powered by VBAT pin will shutdown except for RTC and backup registers.1. I'm wondering if the RTC Alarms can trigger during the VBAT period?2. Will any code execute from the RTC Alarm interrupt during VBAT?...

MVeen.1 · 2023-03-21

My device has various connected sensors and peripherals. The device is intended to go to sleep for extended periods of time before waking up and taking measurements. Currently, the main VDD is a large external battery and VBAT is a coin cell used to ...

MVeen.1 · 2023-10-04

Hi @KDJEM.1 ,I'm using CubeMX and I set my unused pin PA1 to Analog and it is not permitting me to set a PU/PD.You quoted section 6.1 in AN4899 which seems to make it clear that the pin must be PU/PD. In section 7.1, it says to set it as an Analog in...

MVeen.1 · 2023-10-04

Hi @KDJEM.1 ,The AN4899 application note section "Avoid floating unused pin" also recommends setting the pin as PP output driven low for ESD concerns.-So generally we should always set unused GPIO to analog input and Pull Down and that should be okay...

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