[24] NFCT: The FIELDPRESENT register read is not reliable

This anomaly applies to IC Rev. Engineering A, build codes QFAA-AA0, QFAA-AC0, CGAA-AA0.

Symptoms

The FIELDPRESENT register does not show the current field status.

Conditions

Always.

Consequences

The FIELDPRESENT status register cannot be used reliably.

Workaround

Write any register in NFCT twice before reading the FIELDPRESENT register.


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