2024-11-10 10:54 AM
Hello,
I was trying to use RTC battery backup on a nucleo F446RET6.
The problem was that the battery (CR2032) connected to VBAT tries (and can't) to power all the board.
Looking to schematic diagram, I see that VBAT pin is connected to VDD thru SB45.
Removing SB45 seems that all is working fine.
Is there a reason for SB45 is there?
Thanks
Solved! Go to Solution.
2024-11-10 11:28 AM
While there is no battery (or any other separate power supply) connected to VBAT, it is recommended to have VBAT connected to VDD.
JW
2024-11-10 11:28 AM
While there is no battery (or any other separate power supply) connected to VBAT, it is recommended to have VBAT connected to VDD.
JW