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

This anomaly applies to IC Rev. Engineering C, build codes QFAA-BB0, CHAA-BA0, CIAA-BA0.

It was inherited from the previous IC revision Engineering B.

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


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