Window of time the nRF54L15 chip requires to shut down properly without memory corruption.

[Jake Prather]

I didnt see in the data sheet a specific window of time the chip needs to properly shutdown without interrupting a critical process that might cause corrupted memory. I am intending to use additional capacitors to hold enough charge to shutdown the chip but I couldn't find a minimum time requirement in the datasheet for the chip. If there isnt a defined value is that a "good practice" standard? 

Thank you,

James Prather

[Priyanka]

Hi James,

I will check this internally and get back to you.

Regards,

Priyanka

[Priyanka]

Hi James,

Could you mention in which specific scenario you wish to shut down the device? It would be helpful if we could know your application. What is running while the shutdown happens? For example, is it during the process of writing to memory?

-Priyanka

[Jake Prather]

The use case is for customers that randomly disconnect battery power to the device. The MCU is monitoring the battery status to detect when battery has been disconnected to interrupt a write process then shut down without causing the MCU to brick. It might be helpful to define which process are most likely to cause corrupted memory if power is interrupted during those processes. 

I am intending to have a significant amount of capacitance on the board to make sure the chip will have approximately 60-120 seconds of power before the supply regulator turns off. So this might be a pretty low risk.