How to store data on reset

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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?

1 解答

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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

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3 回复数

1,021 次查看

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

1,011 次查看

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

1,002 次查看

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