[64] NFCT: Only full bytes can be received or transmitted, but supports 4-bit frame transmit

This anomaly applies to Revision 2, build codes CIAA-Ex0, QFAA-Ex0, QFAB-Ex0.

It was inherited from the previous IC revision Revision 1.

Symptoms

Data bits are not transmitted, or appear to not be received, if the Frame length is not a multiple of 8 bits (i.e. Frame includes data bits).

Conditions

Frame length is not a multiple of 8 bits (bytes only). Exception: 4-bit frame transmit supported.

Consequences

Partial bytes cannot be transferred:
  • TXD.AMOUNT.TXDATABITS must be 0
  • RXD.AMOUNT.RXDATABITS must be 0

Workaround

None

Parent topic: New and inherited anomalies