Inquiry about FCCU NCF-14 (SWTRS0) on MPC5777C

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Inquiry about FCCU NCF-14 (SWTRS0) on MPC5777C

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youngseolee
Contributor III

Hello 

I'm having the following problem while implementing the MPC5777C based test code.
- Enable SWT A and read NCF of FCCU, fault 14 (SWTRS0) is recorded.
- Tried NFC 14 fault Clear (SWA A disabled and NCF Clear), but the fault still occurs.

Regarding this phenomenon, I have two questions.

1. Under what conditions can the FCCU NCF14 fault (SWTRS0) of the MPC5777C occur?

2. What should I do to clear the FCCU NCF14 fault (SWTRS0) of MPC5777C?

I look forward to your reply.

Thank you

 

 

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petervlna
NXP TechSupport
NXP TechSupport

Hello,

Well this is a bit tricky as the SWT holds line to FCCU (not a toggle).

So any clearing of FCCU status will have effect like 1 clock cycle and then it is already set back since fault line from SWT is still active.

petervlna_0-1681196807003.png

As Reference manual express. Clear first status inside SWT.

Under what conditions can the FCCU NCF14 fault (SWTRS0) of the MPC5777C occur?

The condition is SWT_A reset as explained below:

petervlna_2-1681196960601.png

Best regards,

Peter

 

 

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