This Figure shows an Aurora 8B/10B core with a 4-byte data interface receiving a 4-byte UFC message. The core presents this data to the user application by asserting m_axi_ufc_rx_tvalid and m_axi_ufc_rx_tlast to indicate a single cycle frame. m_axi_ufc_rx_tkeep is set to 4'hF, indicating only the four most significant bytes of the interface are valid.
