[25] NFCT: Reset value of SENSRES register is incorrect

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

Symptoms

The device does not go through an automatic collision resolution successfully and does not generate a SELECTED event when automatic collision-resolution is enabled.

Conditions

Automatic collision resolution is enabled and the NFC peripheral is activated. The poller attempts a collision resolution sequence.

Consequences

The device does not go through an automatic collision resolution successfully.

Workaround

Write 0x00000001 to the SENSRES register before the NFC peripheral is enabled. The SENSRES can be modified based on user requirements later. 

NRF_NFCT->SENSRES = (NFCT_SENSRES_BITFRAMESDD_SDD00001 << NFCT_SENSRES_BITFRAMESDD_Pos);
Parent topic: New and inherited anomalies