SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The 5-port switch (CPSW) Ethernet Subsystem has four 10/100/1000/10G Ethernet ports with selectable RMII, RGMII and SGMII interfaces.
The interface modes for all 4 Ethernet ports are selected by configuring the Ethernet interface mode selection bitfield (PORT_MODE_SEL) in the CTRLMMR_ENET1_CTRL to CTRLMMR_ENET4_CTRL registers.
See the device-specific Datasheet for configuring the pin mux mode as per the interface selected.