topic Re: S32K3 Erase in S32K

S32K3 Erase

1123HENRY — Thu, 12 Jun 2025 07:32:59 GMT

I am currently using the S32K312 chip.

And I want to use the C40 register to erase the chip.

So, I disabled the SPELOCK And SSPELOCK protection before using the C40asf register.

use those code:

for(i=0;i<5;i++){
(*(volatile unsigned int*)(PFLASH0_SPELOCK0+i*4)) = 0;
}
for(i=0;i<4;i++){
(*(volatile unsigned int*)(PFLASH0_SSPELOCK0+i*4)) = 0;
}

So that，SPELOCK0~SPELOCK4，SSPELOCK0~SSPELOCK3 ，It should all be zero.

The PFLASH address of the S32K312 chip is from 0x400000 to 0x5F4000.

I attempted to erase the sectors starting from 0x400000, with each sector being 8K in size.

However, when I erased the address of 0x5C0000，MCRS return a error.

c40asf->MCRS.PEP was 1, This indicates that this area has not been unlocked.

But I should have unlocked all the PFlash areas of this chip.

please help me fix it.

Re: S32K3 Erase

danielmartynek — Thu, 12 Jun 2025 12:03:03 GMT

Hi @1123HENRY,

Only SPELOCK[0] can be cleared by writing a 32-bit value of all zeros.

In contrast, SPELOCK[1] contains sectors that are locked by SBAF, which means those locks are not accessible to the application.

You can only clear the locks that are available to the application.

To do this, either clear the lock bits individually, or apply a mask to selectively clear specific bits.
To verify the current lock status, read the SPELOCK registers using the register view in your debugger or IDE.

Regards,

Daniel

Re: S32K3 Erase

1123HENRY — Fri, 13 Jun 2025 01:01:09 GMT

okay,thanks

Re: S32K3 Erase

1123HENRY — Fri, 13 Jun 2025 01:21:32 GMT

I saw that the SBAF of S32K12 is from 0x5F4000 to 0x5FFFFF, but 0x5C0000 is not within this range.

Re: S32K3 Erase

1123HENRY — Fri, 13 Jun 2025 01:37:40 GMT

And Could you please tell me what the functions of the pflash0 and pflash1 registers are?

Re: S32K3 Erase

danielmartynek — Fri, 13 Jun 2025 08:40:31 GMT

Hi @1123HENRY,

Have you tried clearing the bits individually?

If you want to program the sector at 0x5C0000, clear the corresponding lock, not the whole register. The sectors locked by SBAF cannot be unlocked by the application.

Thanks,

BR, Daniel

Re: S32K3 Erase

1123HENRY — Mon, 16 Jun 2025 03:15:06 GMT

I have solved this problem. By using the "&=" operator, I unlocked the areas that do not belong to SBAF. If all the settings are set to 0, this setting operation will fail.
and Could you please tell me the functions of the pflash0 and pflash1 registers? Through the link file, I found that all the flashes are pflash, and there is no division of pflash into pflash0 and pflash1. What are the differences in the functions of these two registers?
thanks.

Re: S32K3 Erase

danielmartynek — Mon, 16 Jun 2025 07:10:59 GMT

Hi @1123HENRY,

Can you give me the full names of the registers you are asking about?

Thank you