S32KのトピックRe: EEPROM ECC function

EEPROM ECC function

814420552 — Thu, 09 Jul 2020 03:58:57 GMT

hello,

what's the meaning of the Red box？ when ECC check error how does it feedback to users? Can you give me an example？

wish your help

thank you

Re: EEPROM ECC function

lukaszadrapa — Thu, 09 Jul 2020 04:16:02 GMT

Hi,

this is explained in AN11983:

https://www.nxp.com/docs/en/application-note/AN11983.pdf

You are not informed about that by a flag or by an exception, this needs to be handled on application level.

Regards,

Lukas

Re: EEPROM ECC function

814420552 — Thu, 09 Jul 2020 09:02:24 GMT

hello Lukas,

I can't understand this description as the follow red box, could you describe clearly?

thank you

Re: EEPROM ECC function

814420552 — Thu, 09 Jul 2020 09:51:50 GMT

hello， as the description "The read location returns 1's ", my understand is the follow

for example, if the data in EEPROM address A is 0x1010 1010, when read EEPROM address A by 32 bit width, if checked ECC 2bit error, the data in address A is changed to 0xFFFF FFFF.

is my understanding right??

thanks for your help!

Re: EEPROM ECC function

lukaszadrapa — Fri, 10 Jul 2020 05:25:14 GMT

It is possible that there are more records in backup flash for one EEERAM location. For example, if you will write the same EEERAM location several times then new record is created for each write (this is simplified, of course, as there's clean up mechanism and so on...). If the latest one is corrupted, EEE engine will try to search for previous record. If it is available, this older record will be used.

Re: EEPROM ECC function

lukaszadrapa — Fri, 10 Jul 2020 05:26:32 GMT

Yes, that's correct.

Regards,

Lukas

Re: EEPROM ECC function

814420552 — Fri, 10 Jul 2020 06:23:13 GMT

thank you very much， I got it.

wish your have a good day!