Hello together,
I’m on the openmv M7. I like to keep the RTC of the stm32m7xx battery powered to retain the time if the openmv is in stop mode.
Acccording to the schematics VDD and VBAT are connected.
That means I will draw my battery if no other power supply is given.
That means I cannot power the battery domain in openmv m7 sepeately to keep RTC information while the openMV has no access to main power supply.
Is this correct?
Our board draws about 1mA in stop mode. Once H7 sales increase we may rev the board to give it more features. However, the amount of inventory we are moving will have to go up by an order of magnitude for that.
I think you can turn pull ups built into the I/O pins on. Keep in mind the I2C bus can also be a UART or general I/O pin. It would have not made sense to add pull ups.