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BIST CRC failure - sometimes

Question asked by Ramesh Sathiyamoorthy on Feb 7, 2019

Hi,

 

we will be using MPC577M. enabled offline selftest(STCU2) with CRC. able to run the test and results are OK.

Noticed, we do destructive reset for diagnostic functionality often noticed the CRC test failing. 

 

when do reset via debugger (trace32) SYStem.RESetTarget, noticed behaviour consistent and CRC is OK.

 

do perform destrucive reset here is code snippet,

Clear FES

Clear DES

Clear DRET

ME_MCTL = 0xFFFF5AF0UL

ME_MCTL = 0xFFFFA50FUL

 

other tests doesn't have any impact. No failure on LBIST or MBIST.

 

Please guide me for further analysis.

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