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LaneYE
Level 2
5 replies posted 10 sign-ins First question asked
Level 2
 

Hello,

About TC397 FMEDA, i have some questions.

>>What's the meaning of MFC=RED, the RED is equal to redundant?If it is, equal to what SM?

>>As the LFM of SM[HW]:PMS:VDDM_MONITOR[FMC=RED] is 99.99%, so which SM cover the failure of SM[HW]:PMS:VDDM_MONITOR[FMC=RED]?

2022-07-25_17h22_57.png

Looking forward to you reply.

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dw
Moderator
Moderator 500 replies posted 50 likes received 250 sign-ins
Moderator

Hi LaneYE,

About red mark, please see below:

dw_0-1659158033499.png

dw_1-1659158769034.png

 

dw

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dw
Moderator
Moderator 500 replies posted 50 likes received 250 sign-ins
Moderator

Hi LaneYE,

Residual Fault (RF): portion of a fault that by itself leads to the violation of a safety
goal, occurring in a hardware element, where that portion of the fault is not covered by
safety mechanisms
 
Multiple Point Fault (MPF): individual fault that, in combination with other independent faults, leads to a multiple
point failure
–Unless shown relevant in the safety concept, multiple-point faults with higher order than 2 can be considered as safe faults
Below flow chart is for your reference.
 
dw_0-1658803206362.png

 

Regarding to Safety Mechanisms of VDDM_MONITOR,  please refer to 6.346 SM[HW]:PMS:VDDM_MONITOR in AURIX TC3xx Safety Manual.

 

dw

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LaneYE
Level 2
5 replies posted 10 sign-ins First question asked
Level 2

Hello, dw

Thank for your reply. I still have three problems.

1.What's the meaning of 'RED' in '[FMC=RED]'?

2.As for SM[HW]:PMS:VDDM_MONITOR, there doesn't have self-test of this SM described in safety manual, so how to cover this SM's fault?

3.Additional, there has MPU self-test to detect MPU SM's failure in safety manual of TC275, why has MPU selt-test been deleted in safety manual of TC397? 

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dw
Moderator
Moderator 500 replies posted 50 likes received 250 sign-ins
Moderator

Hi LaneYE,

Do you mean how to self-test the VDD monitor? Please refer to 4.1.4 Monitor Built-in Self Test (MONBIST) in Aurix TC3xx Safety Manual.

dw

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LaneYE
Level 2
5 replies posted 10 sign-ins First question asked
Level 2

Hello, dw.

Got it and MONBIST is also descried in user manual, chapter 11.2.2.5.4.

About other two questions, could you give answers?

Thank you.

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dw
Moderator
Moderator 500 replies posted 50 likes received 250 sign-ins
Moderator

Hi LaneYE,

About red mark, please see below:

dw_0-1659158033499.png

dw_1-1659158769034.png

 

dw

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