NRF52 Non volatile Memory

RE: NRF52 Non volatile Memory

Susheel Nuguru — Thu, 30 Jan 2020 10:13:10 GMT

If your data is changing dynamically and more or less frequently, then you cannot write it to the same address of the flash without erasing the flash block. And the smallest erase unit is a page which is 4KB. So I do not see that you can remove the dependency of minimal 4KB size anyway to have erase capabilities.

RE: NRF52 Non volatile Memory

Oussama — Thu, 30 Jan 2020 08:30:55 GMT

Thank you for the answer. But my data changes dynamically and more or less frequently. So erasing the chip is not an option.

Is there a way i can erase the UICR Customer register without erasing anything else ?

RE: NRF52 Non volatile Memory

Susheel Nuguru — Thu, 30 Jan 2020 08:12:18 GMT

There are some UICR->CUSTOMER registers that you can use to save small amount of persistant data.

The problem is that once written to these registers, the data cannot be erased without erasing the whole chip. So if you want to transmit 4 bytes of dynamically changing data frequently, this might not suit you.