TRAVEO™ T2G Automotive Body Controller - FAQ – FAULT - KBA232509

Home Page TRAVEO T2G Automotive Body Controller FAQ CDC 17 Fault 171 Is it mandatory to check the VALID bit when a fault interrupt occurs It is recommended to check the VALID bit always and clear it as recommended in AN219842 It is the proper way to use the fault structure Following are some instances when VALID bit can be 0 but ISR gets triggered Fault ISR is triggered by setting the INTRSET register of the fault structure This is a software triggered fault and the VALID bit will not be set 2a There are faults during system startup before OS initialization when the ISR is disabled So fault ISR is pending 2b The fault registers are cleared 2c ISR initialization and enabling happens after this 2d The pending ISR will get triggered But the fault register VALID bit will be 0

Home Page: TRAVEO™ T2G Automotive Body Controller - FAQ – CDC

17. Fault

17.1. Is it mandatory to check the VALID bit when a fault interrupt occurs?

It is recommended to check the VALID bit always and clear it as recommended in AN219842. It is the proper way to use the fault structure.

Following are some instances when VALID bit can be "0", but ISR gets triggered:

Fault ISR is triggered by setting the INTR_SET register of the fault structure. This is a software triggered fault and the VALID bit will not be set.

2a. There are faults during system startup before OS initialization when the ISR is disabled. So, fault ISR is pending.

2b. The fault registers are cleared.

2c. ISR initialization and enabling happens after this.

2d. The pending ISR will get triggered. But, the fault register VALID bit will be "0".

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