S32G SAF and/or SCST usage

huanchen_fusa — Thu, 19 Jan 2023 06:47:43 GMT

Hello,

we are going to use the SAF for NXP_S32G399A. Now here is a question about the other premium SW lib -- SCST.

From the introductions my understandings are

- SCST is intended to be used in A53 core in this case (S32G), because the M7-core must be lock-step cores

- SCST is only necessary to be used (in S32G case), if A53 core is not configured as lock-step mode and safety relevant SW is running on that.

Are these understanding correct?

Re: S32G SAF and/or SCST usage

Daniel-Aguirre — Thu, 19 Jan 2023 17:46:32 GMT

Hi,

Given this is a public channel we do recommend going directly to your local NXP representative/FAE due to this inquiry being related to a premium software.

As for your understandings, below will be some comments:

- SCST is intended to be used in A53 core in this case (S32G), because the M7-core must be lock-step cores

>> There is no telling on the public documents regarding the M7-core comment. The following is said in the Product Brochure:

"The SCST Library described in this product brief is available for NXP S32G device’ Arm® Cortex-A53 core." [Page 4, Structural Core Self-Test Library, Product Brief, Rev. 2, 04/2022]

- SCST is only necessary to be used (in S32G case), if A53 core is not configured as lock-step mode and safety relevant SW is running on that.

>> The following is said in the product brochure:

"The SCST Library can be used to detect single-point faults or latent faults, see [1] for the fault differentiation. In both cases SCST detect permanent faults only and it is primarily intended for processor cores which do not use HW techniques supporting safety in terms of permanent fault detection, e.g. delayed-lockstep." [Page 2, Structural Core Self-Test Library, Product Brief, Rev. 2, 04/2022]

There is no telling about safety SW.

As we said before, we do recommend taking these inquiries to your local NXP representative/FAE for them to channel it through the correct medium.

Please, let us know.

S32G中的主题 S32G SAF and/or SCST usage

S32G SAF and/or SCST usage

Re: S32G SAF and/or SCST usage