Digilent Genesys ZU Reference Manual page 23

5.2. 1G Ethernet
The Genesys ZU uses a TI DP83867CR PHY to implement a 10/100/1000 Ethernet port for wired
connectivity. The PHY connects to MIO Bank 501 (1.8V) and interfaces to the MPSoC via RGMII for data
and MDIO for management. The auxiliary interrupt (ETH_INTN_PWDNN) and reset (ETH_RSTN) signals
also connect to MIO Bank 501.
After power‐up the PHY starts with Auto Negotiation enabled, advertising 10/100/1000 link speeds and
full duplex. If there is an Ethernet‐capable partner connected, the PHY automatically establishes a link
with it, even with the MPSoC not configured.
Three status indicator LEDs are on‐board near the RJ‐45 connector that indicate speed (LD13), valid link
state (LD12), and traffic activity (LD14).
Although the default power‐up configuration of the PHY might be enough in most applications, the
MDIO bus is available for management. The PHY is assigned the 5‐bit address 01111 on the MDIO bus.
With simple register read and write commands, status information can be read out or configuration
changed. The TI PHY follows industry‐standard register map for basic configuration.
The RGMII specification calls for the receive (RXC) and transmit clock (TXC) to be delayed relative to the
data signals (RXD[0:3], RXCTL and TXD[0:3], TXCTL). Xilinx PCB guidelines also require this delay to be
added. The PHY is configured to insert a delay of 2.0ns between RXD/CTL and RXC, and a delay of 1.5ns
between TXD/CTL and TXC.
On an Ethernet network each node needs a unique MAC address. To this end, the last sector of the
Quad‐SPI flash has been programmed at the factory with a 48‐bit globally unique EUI‐48/64™
compatible identifier. For more details about MAC address storage see Quad‐SPI Flash.
U‐Boot has been patched to read this MAC address and overwrite the existing node in the device tree
binary before handing control over to the Linux kernel.
The identifier is also printed on a sticker found next to the Ethernet jack (J14).
5.3. 10G SFP+
Todo for 5EV.
5.4. WLAN, Bluetooth, WWAN
The Mini PCIe socket allows you to connect any wireless radio module compatible with the PCIe Mini
Card standard. With both PCIe x1 and USB 2.0 available in the socket, even dual Wi‐Fi/Bluetooth