Jaehyek Choi Embedded/Firmware Engineer

eMMC UFS Issues 13

2017-01-03
Jaehyek

Component Feature

  • Controller :
  • Hy

Failure Symptom

  • When assert, Bit Flip samples FA status

Root Cause

  • System Block Consistency FAIL
  • The FTL Meta Data for Map table got a bit flip, and then FW ASSERT
  • While GC for Map Block , the bit flip cause the number of vaild page mismatch not consistency
  • and then produced the ASSERT
  • and then FW ASSERT while booting

001

Cause of bit flip

  • suspection of SRAM defect
  • After code review, There is no code to change the bit flip
  • No defect in the Map Table Meta Data

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