SPRUJB3C March 2024 – November 2025 AM67 , AM67A , TDA4AEN-Q1 , TDA4VEN-Q1
Packets received (CPSW ingress) on the host port are sent store-and-forward to all Ethernet destination ports. Setting the CPSW3_CPSW_NU_CPSW_NU_CPPI_P0_CONTROL_REG[19] CUT_MODE_ETH bit enables Ethernet received packets to be sent cut-thru to a destination port mask that includes the host port. The packet can egress cut-thru on Ethernet ports, but the packet will not actually egress cut-thru on the host port. Setting CPSW3_CPSW_NU_CPSW_NU_CPPI_P0_CONTROL_REG[19] CUT_MODE_ETH can cause head of line blocking on the host priority if multiple Ethernet ports are sending to the same host port priority. The head of line blocking issue is worsened if there are differing Ethernet port speeds. Clearing the CPSW3_CPSW_NU_CPSW_NU_CPPI_P0_CONTROL_REG[19] CUT_MODE_ETH bit causes packets with the host port in the destination mask to egress store-and-forward on all egress ports.