Verdin Carrier Board Design Guide
Preliminary – Subject to Change
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2.2.3 Unused PCIe Signals Termination
Preferable connect to GND if not used or leave NC
Preferable connect to GND if not used or leave NC
Add pull-up resistor or disable the wake function in software
Add pull-up resistor or disable the I
2
C function in software
Add pull-up resistor or disable the I
2
C function in software
Table 5: Unused PCIe Signals Termination
2.3 Ethernet
The Verdin module standard features up to two Ethernet interfaces. There is a media dependent
Gigabit Ethernet port on the "Always Compatible" interfaces which has the Ethernet PHY on the
module. A second Ethernet interface is available as Reduced Gigabit Media-Independent Interface
(RGMII) as "Reserved" interface. The RGMII requires a PHY to be placed on the carrier board and
allows using multiple types of media for the physical link layer.
2.3.1 Media Dependent Ethernet Port
The Verdin features one media dependent Gigabit Ethernet (1000Base-T) interface port (MDI). The
interface is backward compatible with the 10/100Mbit Ethernet (10BASE-T and 100BASE-TX)
standard. The Ethernet PHY is located on the module. Therefore, only the magnetics are required
on the carrier board. The interface operates in the “voltage” mode. This means, there is no center
tap voltage required.
2.3.1.1 Media Dependent Ethernet Signals
1000Base-T: DA+
10/100Base-TX: Transmit +
1000Base-T: DA-
10/100Base -TX: Transmit -
1000Base-T: DB+
10/100Base -TX: Receive +
1000Base-T: DB-
10/100Base -TX: Receive -
1000Base-T: DC+
10/100Base -TX: Unused
1000Base-T: DC-
10/100Base -TX: Unused
1000Base-T: DD+
10/100Base -TX: Unused
1000Base-T: DD-
10/100Base -TX: Unused
LED indication output for activity on the Ethernet port
LED indication output for established Ethernet link
Table 6: Ethernet signals
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