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Regarding static time fault handling in S12ZVM

Question asked by PRATIBHA SURABHI on May 22, 2020
Latest reply on May 28, 2020 by Daniel Martynek

Hi all,

I have question regarding below point from S12ZVM datasheet, Static Timing Fault Handling
The following Faults and/or errors can occur:
• Desaturation error, Overvoltage, Undervoltage, External fault
The application run-time error is handled by the GDU without CPU interaction. Firstly the FETs are
disabled and the PMF signals switched to an inactive state. To re-enable the operation first the GDU fault
and then PWM fault must be cleared, to automatically re-enable the FET driving at the next PWM

As per this point , to re-enable the FET driving, SW should clear the GDU and PWM faults.


In our SW we have cleared the GDU fault(GDUF flag) in initialization setting of GDU.

For PMF fault setting is not done. Reset setting is used.


I want to know, is PWM fault is nothing but PMF fault?

If PWm fault is different than PMF fault then, please let me know what setting is required for PWM fault to enable/disable.


Request you to please share the details of above question as early as possible.