What is operating voltage for nRF52832 Flash memory?

[Gaurav]

What will be the operating voltage for nRF52 flash memory when using with CR2025 battery? I want to read/write data flawlessly in flash using CR2025 battery.

[Turbo J]

I want to read/write data flawlessly in flash using CR2025 battery.

The operating current of an NRF52 is dangerously close to the short circuit current of a CR2025. You want several large-ish reservoir caps (10s of µF) on your board to counter the voltage drop on the internal resistance in the cell.

The voltage required for flash operations is the same as the standard operating voltage, so a CR2025 would deliver enough voltage when fully charged and the NRF52 is in low power sleep mode. While flashing the current draw will lower the voltage on the cell significantly, that is where the above mentionened caps come into play.

You probably also want long sleep cycles between flash erase/writes to allow cell and capacitor(s) voltage to recover.