S32KのトピックRe: power cycle needed after flash erase/program

power cycle needed after flash erase/program

KelvinSmith — Mon, 26 Jun 2023 18:13:44 GMT

When our code reflashes the data flash memory, often (but not always) it is necessary to power cycle the board before the new data reads correctly.

So, for more details, the flash memory is at address 0x10000000 and we write about 10 bytes into it as configuration data. When configurations are to be changed, we erase that sector and then write the new data there. Frequently, after this, the data at address 0x10000000 continues to read the old values until after a power cycle, at which point it holds the new values.

Is there something that the code can do to flush out these stale values?

Re: power cycle needed after flash erase/program

davidtosenovjan — Tue, 27 Jun 2023 05:57:27 GMT

Could you please specify used device's partnumber? Thanks

Re: power cycle needed after flash erase/program

KelvinSmith — Tue, 27 Jun 2023 15:44:03 GMT

This is the S32K146.

Re: power cycle needed after flash erase/program

davidtosenovjan — Thu, 29 Jun 2023 12:25:17 GMT

Do you have disabled cache before flash programming?

Pay attention to following thread:

https://community.nxp.com/t5/S32K/S32K144-FLASH-CACHE/m-p/778380

Re: power cycle needed after flash erase/program

KelvinSmith — Fri, 30 Jun 2023 19:05:06 GMT

Thanks, that appears to have solved the problem.