RTC Vbackup doesn't work

[gdisimino]

Hi everybody. Hi have made my own board with CYBLE-416045-02. I have put on V_Backup pin a 3V battery. When I remove VDD (in the schematic VCC_3.3_CYBLE) RTC resets to the last saved datetime. Can You help me? Thanks. In the follow I have attached the piece schematic and the init code of rtc

void init_rtc(void){
cyhal_rtc_init(&my_rtc);
}

[BragadeeshV · Accepted solution]

Hi @gdisimino ,

Can you ensure that you have set the vBackup source as Dedicated Supply in the Systems tab of the device configurator?

[gdisimino]

Hi @BragadeeshV ,

thank you for the right answer! Now it works!