[263] CCM: On-the-fly decryption fails for direction finding packets

This anomaly applies to Revision 2, build codes QDAA-C00.

It was inherited from the previous IC revision Engineering B.

Symptoms

MICSTATUS reports CheckFail, and decrypted data is wrong.

Conditions

The header of the received Bluetooth packets has the CP bit set and contains the CTEInfo byte.

Consequences

Direction finding packets are incorrectly rejected.

Workaround

Replace the PPI connection from RADIO EVENTS_ADDRESS event to CCM TASKS_CRYPT with a PPI connection from RADIO EVENTS_BCMATCH to CCM TASKS_CRYPT and configure the RADIO register BCC with the value 3.

Parent topic: New and inherited anomalies