[135] USBD: SIZE.ISOOUT register does not report empty incoming packets

This anomaly applies to IC Rev. Engineering A, build codes QIAA-AA0.

Symptoms

The SIZE.ISOOUT register does not report empty incoming packets in the ZERO field.

Conditions

Always.

Consequences

The firmware cannot rely on the ZERO field to know if a zero-length ISO OUT packet has been received.

Workaround

None.