S32K中的主题 Re: S32K14X CSEC pram data fillling problem

S32K14X CSEC pram data fillling problem

1113240626 — Sun, 23 Nov 2025 01:40:12 GMT

as demo(cesc_keyconfig) say:

plaintext = 00112233445566778899aabbccddeeff
ciphertext = 69c4e0d86a7b0430d8cdb78070b4c55a

why data is 32bit reversed when filling in pram ?

link plaintext = 0x00112233 0x44556677

ciphertext=0x69c4e0d8 0x6a7b0430.

Do you have any document to explain this ?

回复： S32K14X CSEC pram data fillling problem

1113240626 — Mon, 24 Nov 2025 01:49:35 GMT

Is csec subsystem big endian?

回复： S32K14X CSEC pram data fillling problem

1113240626 — Mon, 24 Nov 2025 01:58:21 GMT

I saw PRAM description that the pram interface is Big Endian in s32kRM_r9, and pram interface is Little Endian in s32kRM_r14. what happened? The chip‘s design had been changed？or is s32kRM_r9 error?

Re: S32K14X CSEC pram data fillling problem

Senlent — Tue, 25 Nov 2025 05:54:03 GMT

Hi@1113240626

Re: S32K14X CSEC pram data fillling problem

1113240626 — Wed, 26 Nov 2025 09:56:59 GMT

hello, thanks for your response.

in s32RM_rel14, like the picture below。

Re: S32K14X CSEC pram data fillling problem

Senlent — Thu, 27 Nov 2025 02:51:22 GMT

Hi@1113240626

You don't need to waste your time on this.

You can check how the API "CSEC_WriteCommandBytes()" fills the PRAM.