Writing/reading to/from non-volatile memory MC9S12XF512

[thomasbelekokia]

hi,

i'm using  MC9S12XF512 devices, trying to store small piece of data in non-volatile memory.

tried to adapt code for different devices but the most i could achieve is to store/read data in debug mode.

no success when not in a debug mode.

basically the idea is to start running running a device and once a switch is ON, store a byte of data in a non-volatile mem. Then power cycle, check memory, data is safely written in the memory.

perhaps there are people who have done it hundreds of times, so an idea/advice would be very helpful.

[thomasbelekokia]

Thanks for that.

I've just managed to get it working with AN3961SW & AN3961.

Will try now bootloaders that you suggested, I think if I combine two of those I'll get pretty much what I was expecting.

thanks again.

[ZhangJennie]

you are welcome!

[ZhangJennie · Accepted solution]

AN4258.pdf and AN4258SW include how to implement how to implement HCS12x non-volatile memory.

hope this can help