flash Number of uses

[cabin]

softdvice : s132 

SDK version : nRF5_SDK_17.1.0_ddde560

Hi

In the project I'm working on, I need to store 3 bytes of usage time information. So I need to store data in flash in 1-minute units.

I just execute Write and Read, no separate erase is performed.

So I'm reviewing the following two methods.

1. fstorage
2. UICR

If I don't erase, I would like to know what the usage limit is for the above two.

Thank you

BR

Cabin

[Turbo J]

See PS chapter 11.8.1 "Flash programming".

You are allowed to write a block up to 181 times between erases.

Note that you also need to solve the issue of only being able to write a "0" bit but never a "1" bit.

I recommend looking at how the peer manager saves data in FDS...

[cabin]

HI

What is the 0 bit and 1 bit problem?
Does using FDS solve the cycle problem? Does it solve only the bit problem?
Does FDS refer to the flash_fds example?

[Sigurd]

cabin said:

What is the 0 bit and 1 bit problem?

See this page in the PS: https://docs.nordicsemi.com/bundle/ps_nrf52832/page/nvmc.html#d929e53

cabin said:

Does using FDS solve the cycle problem? Does it solve only the bit problem?
Does FDS refer to the flash_fds example?

See this page. https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/lib_fds.html

flash_fds is a example that shows how to use the FDS library.