I'm designing a new low cost application and I need to save some data in a falsh sector when power fails.
I have questions:
- it's ok to use the LVD interrupt to start the flash save procedure? What is the VDD minimum that cause the interrupt (threshold)?
- This interrut can leave me time enough to write a flash sector?
The not so low cost solution is to have an external circuit connected to an IRQ pin that allow me to define the threshold.
Are these available solutions or someone had some different ideas?
Thaks in advvance.