DOM MB Diagnosis page
Board ID:
Rev 5.0 SN 0332
Source:
From inspection, August 11,
2004
Symptoms:
Cold Boot failure; Communications
falure.
Analyst(s):
T. Stezelberger
Analysis Procedure(s):
Investigate race condition between EPC8 and EPXA4 download conditions
Root cause:
Timing margin shifted out of range
at low temperature, violating download requirement.
Mitigation:
Change CPLD firmware to enforce timing requirement upon EPC8 and EPXA4.
Disposition:
Test at low temperatures to
observe the effectiveness of the solution.
STF test run at -75C; as expected, the
Any Other Information:
Travler