Hello,
I'm busy with a custom board with an AM3352 and the TPS65217C as a pmic, like in the Beaglebone Black. I use this PMIC so I can charge a battery.
Now I would like to use the internal RTC of the AM3352, but there will be talked about use of on/off switch in our design, but the need for the time/date to be update must stay.
Now instead of connecting VLDO1 to the VDDS_RTC pin of the AM3352, I tought to use an 1.8Volt regulator who is connected to the battery and provide an continues 1.8V to the VDD_RTC pin.
On this said I would like to know if the AM3352 can start up when power is given to the pmic, because I read that when VLDO1 goes high, the AM3352 will enable the PMIC_POWER_EN pin. Can this work? Or is a I2C RTC chip like the DS1340 a better solution?
Thanks in advance
