topic Re: How to store data on reset in i.MX Processors

How to store data on reset

lazaro — Mon, 06 Feb 2023 21:20:31 GMT

I'm using an MXRT1062 micro, after a certain number of restarts the watchdog is going off causing an error when the system is back on. I want to store the PC before the shutdown but don't have enough time to store it to flash. Is there anything on this chip I could use to store the PC before the reboot while the watchdog is going off?

Re: How to store data on reset

jingpan — Tue, 07 Feb 2023 10:59:53 GMT

Hi @lazaro ，

There is a 256-bit general-purpose register in SNVS. Maybe you can use it. Please refer to 20.3.3.2.1 in reference manual.

Regards,

Jing

Re: How to store data on reset

lazaro — Tue, 07 Feb 2023 20:05:12 GMT

Is there an application note on how to use the SNVS?

Re: How to store data on reset

jingpan — Wed, 08 Feb 2023 05:55:47 GMT

Hi,

Please refer to this link

https://community.nxp.com/t5/i-MX-RT/SNVS-general-purpose-registers/m-p/918327

If you haven't backup battery, there is no other way in this chip. You have to add a I2C eeprom or something like that.

Regards,

Jing