topic Re: CSE PRAM is not writable (S32K146) in S32K

CSE PRAM is not writable (S32K146)

warai — Wed, 26 May 2021 00:15:56 GMT

Hi,

Why is address 0x14001000 (CSE PRAM) is non-writable?

Did I messed up my flash partitioning?

Is the location part of the FPROT?

Kind regards,

Marizonne

Re: CSE PRAM is not writable (S32K146)

lukaszadrapa — Wed, 26 May 2021 11:15:38 GMT

Hi Marizonne,

how did you partitioned the device?

Let me copy here from the reference manual some reasons why the PRAM is locked:

And:

So, I would check the content of FSTAT register as a first step.

Regards,

Lukas

Re: CSE PRAM is not writable (S32K146)

warai — Thu, 27 May 2021 03:04:00 GMT

Hi Lukas,

The FSTAT has no error flags asserted.

My suspicion is that the board I'm using is partitioned with CSEC Key Size = 0. This is the reason why the PRAM is non-accessible. Is my understanding correct?

Re: CSE PRAM is not writable (S32K146)

lukaszadrapa — Thu, 27 May 2021 11:59:20 GMT

Hi,

yes, that's correct. The PRAM is available if the CSE is enabled by partitioning - when the number of keys is configured to non-zero value.

Regards,

Lukas

Re: CSE PRAM is not writable (S32K146)

Usernamex — Fri, 04 Aug 2023 09:30:22 GMT

Hi LuKas,

is there any way to unlock the CSE?

i've got the same problem after i called the eraseKeys() API from csec_utils.c.

after that, any write to CSE_PRAM will cause a DefaultISR.

the FSTAT is 0x80; FCSESTAT is 0x40.