Resolved! On STM32H7 if VBAT is not connected, but VDD is always present. Does NRST maintain backup registers?
I have an STM32H7 on a custom board. We do not have VBAT connected to anything. We do have a battery always connected to VDD. When I reset the MCU using the NRST pin it seems like the backup domain (registers and RAM) are not maintained. Is this expe...