[i.MX RT1170]How to achieve ASIL A based on i.MXRT1170

[Sam_Gao]

Hi Safety team,

I have a query about functional Safety that requires your assistance. Please find the customer's original post here.

We are currently developing a small, round secondary display with a size less than 1 inch, which needs to comply with functional safety requirements. We came across online references showing automotive safety display solutions(e.g. Digital Cluster ) based on the i.MX RT1170 and the safety microcontroller S32K.

However, due to the limited board space in this project, there is no space to include the S32K. We would like to know if it's possible to achieve ASIL A compliance through a combination of a functional safety development process and software implementation — specifically, by using the RT117x together with FFI, DFA, and SSA to meet ASIL-A requirements?

Could you please provide any relevant use cases or reference documents for such an approach?  Thank you.

B.R,

Sam

[Sam_Gao]

Hi,

Here are comments from internal colleagues:

1. RT1170 has no Functional Safety deliverables (either for SoC or SW). Generally, ASIL A could be achievable even with this quality managed SoC (RT1170) and with external Safety PMIC / watchdog ensuring safety qualification. But all depends on System safety concept with identifying System safety requirements to be met.

2.  The response to the customer should be that NXP cannot make this determination.  They must consult with their safety and legal assessment teams for what can be achieved on QM hardware to meet ASIL-A for their system.  If they can determine a software solution will work, we can likely implement it for them using ISO26262 development process under professional services.