SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The CPRGMII is operating in the in-band mode of operation when the RGMII_RX_INBAND input is asserted. RGMII_RX_INPUT is asserted by configuring the CTL_EN bit to 1h of the CPSW_PN_MAC_CONTROL_REG register. The link status, duplexity, and speed are determined from the RGMII input data stream RXD[3:0] when RX_CTL is deasserted, as defined in the RGMII specification. The PHY might need to be configured beforehand to output in-band data. The in-band data is indicated as shown in Table 12-941.
RXD3 | RXD[2:1] | RXD0 | |
---|---|---|---|
Duplex status: | Link Speed: | RXC_CLK Speed: | Link Status: |
0h: half-duplex | 0h: 10-Mbps mode | 2.5 MHz | 0h: Link is down |
1h: full-duplex | 1h: 100-Mbps mode | 25 MHz | 1h: Link is up |
2h: 1000-Mbps mode | 125 MHz | ||
3h: Reserved | Reserved |