Apoolo-S10
User Manual
69
www.terasic.com
March 31, 2020
HPS_USB_DIR
PIN_D30
Direction of the Data Bus
1.8V
HPS_USB_NXT
PIN_A27
Throttle the Data
1.8V
HPS_USB_STP
PIN_C33
Stop Data Stream on the Bus
1.8V
2.11
Gigabit Ethernet
The board supports Gigabit Ethernet transfer by an external Micrel KSZ9031RN PHY
chip and HPS Ethernet MAC function. The KSZ9031RN chip with integrated
10/100/1000 Mbps Gigabit Ethernet transceiver also supports RGMII MAC interface.
shows the connections between the HPS, Gigabit Ethernet PHY, and
RJ-45 connector.
For more information about the KSZ9031RN PHY chip and its datasheet, as well as the
application notes, which are available on the manufacturer’s website.
Figure 2-13 Connections between the HPS of Apollo S10 and RGMII MAC
There are two LEDs, a green LED (LEDG) and a yellow LED (LEDY), which represent
the status of the Ethernet PHY (KSZ9031RN). The LED control signals are connected
to the LEDs on the RJ45 connector. The state and the definition of LEDG and LEDY
. For instance, the connection from board to Gigabit Ethernet is
established once the LEDG lights on.
Table 2-25 State and Definition of LED Mode Pins
LED (State)
LED (Definition)
Link /Activity