HI, we made circuit with MB9BF566R. We are using a lithium battery pack as backup. I found an electrical schema already made by my ex colleague.
He connects the Main supply ( Vcc) with pin Vbat. Please you can see from my schematic attached( i used a green circle in the picture). Now, i removed all the connection with battery (+vbat net) but i can read from my battery pin ( CN1 connector) 2.7V when the battery pack is not connected
. I think it's not correct the connection of VBAT pin with Vcc pin. Vbat have to supply the rtc and micro controller independently from main supply ( Vcc pin). Is it correct? so I have to remove connection of vbat pin with Vcc pin.
I signed with red cross the component not mounted.
I hope my request is clear.