SCST software usage for S32K146

[takada_shuichi]

Hello, I am using the S32K146 and I would like to confirm the SCST function. From the document of S32K146, if SCST library is used, Coverage of ASIL-B would be 80%. If SCST library is applied to ISO13849, 90% of DC coverage can be achieved?
And also, This SCST can be met to "Self-test supported by hardware (one channel)" of Table A.4-Processing units of IEC61508-2. Is it correct? If not, please advice what Diagnostic technique does it meet?
As background, I am considering the new sensor unit that have S32K146 and would like to meet PLd (Category 2) of ISO13849.

[takada_shuichi]

Thank you for the response. I change my question. NXP mentioned if SCST is applied, ASIL-B can be achieved. Please provide the details how do we achieve the ASILB by SCST?

[takada_shuichi]

Hello NXP team,

I need the answer against below my question previously. Please answer it.

NXP mentioned if SCST is applied, ASIL-B can be achieved. Please provide the details how do we achieve the ASILB by SCST?

[aarul]

Hi

If you have access to the SCST Library from NXP, then along with it we provide Safety Manual, Safety Analysis and Fault Coverage Estimation. The latest package that I see is : SCST_M4_S32K144_RTM_1.0.5_SafetyPack.zip

Please try accessing it from NXP's Software Center.

https://www.nxp.com/design/software:SOFTWARE-CENTER#/home/query/~query~/~filter~/relevance/0

Regards

-Aarul

[aarul]

Hi

SCST helps to diagnose random faults in the core with a diagnostic coverage of up to 90%. The library has been developed in accordance with ISO26262 and NXP provides a safety package along with SCST that contains the safety analysis.

Hope this answer your question.

Regards

-Aarul

[takada_shuichi]

Thank you for the reply. You mean if use the SCST,  do you know ISO13849 DC Coverage 90% can be achieved?

And also, please let me know the which item can be achieve in "Processing units" of  IEC61508-2.

[soichiyamamoto]

Hi,

When using SCST software, it says ASIL-B Coverage 90%. Is it applicable to ISO13849 DC Coverage 90%?
We believe that it falls under the following deficit frame in IEC 61508-2. If they are different, please tell us which one applies.
As a background, I am thinking of using S32K146 this time to satisfy PLd (Category 2) at the component level.
Without using this SCST, I think that I will not be able to get Medium or higher in the Processing Unit.

Best Regards,

soichi/avnet

[aarul]

Hello

Unfortunately I am not aware of ISO13849. In general, the diagnostic coverage achieved by SCST is independent of the diagnostic numbers in standards as the number in the standard are usually for guidance. I think you should use the number provided by NXP with additional argumentation supported by the standard you have.

Regards

-Aarul