3.4.2 10/100/1000 On-Board RGMII Ethernet Interface (GMAC1)

The SAMA7D65 Curiosity Pro board features a complete on-board RGMII Ethernet interface, implemented with the VSC8541-02 PHY.

The VSC8541-02 is designed for space-constrained 10/100/1000BASE-T applications. It features integrated line-side termination to conserve board space, lower EMI and improve system performance. Additionally, integrated RGMII timing compensation minimizes the need for on-board delay lines.

The VSC8541 is a low-power, single-port triple-speed (10BASE-T/100BASE-TX/1000BASE-T) Ethernet physical layer transceiver (PHY) optimized for precision process timing. The device enables highly accurate synchronization of motors, valves, actuators and sensors over standard CAT-5, CAT-5e and CAT-6 unshielded twisted pair (UTP) cables.

Additionally, for monitoring and control purposes, the RJ45 connectors feature LED functionality to indicate activity, link and speed status.

Figure 3-24. 10-100-1000 On-Board RGMII Ethernet Interface

Figure 3-25. On-Board GMAC Power Supply Source

Table 3-11. 10/100/1000 On-Board RGMII Ethernet Interface Signal Description
PIO	Signal Name	Signal Description
PE03	GMAC1_0.INT	GMAC1 interrupt line
PD25	GMAC1_0.MDC	RGMII management data clock signal
PD26	GMAC1_0.MDIO	RGMII management data I/O signal
PD27	GMAC1_0.RX0	RGMII Rx data line 0
PD28	GMAC1_0.RX1	RGMII Rx data line 1
PD30	GMAC1_0.RX2	RGMII Rx data line 2
PD31	GMAC1_0.RX3	RGMII Rx data line 3
PE02	GMAC1_0.RXCK	RGMII receive clock signal
PD24	GMAC1_0.RXCTL	RGMII receive control signal
PD22	GMAC1_0.TX0	RGMII Tx data line 0
PD23	GMAC1_0.TX1	RGMII Tx data line 1
PE00	GMAC1_0.TX2	RGMII Tx data line 2
PE01	GMAC1_0.TX3	RGMII Tx data line 3
PD29	GMAC1_0.TXCK	RGMII transmit clock signal
PD21	GMAC1_0.TXEN	RGMII transmit enable