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SD_DATA[0÷3]: SD Card data bus. SD_DATA0 signal is used for all communication modes. SD_DATA[1÷3] signals are required for 4-bit communication mode.
SDIO_VDD: +3.3V_RUN SD dedicated Power rail
3.3.12 Gigabit Ethernet connectors
Gigabit Ethernet Port #1
Pin
Signal
Pin
1
GBE1_MDI0+
2
GBE1_MDI0-
3
GBE1_MDI1+
4
GBE1_MDI2+
Optional Gigabit Ethernet Port #2
Pin
Signal
Pin
1
GBE2_MDI0+
2
GBE2_MDI0-
3
GBE2_MDI1+
4
GBE2_MDI2+
GBEx_MDI0+/GBEx_MDI0-: Ethernet Controller #x Media Dependent Interface (MDI) I/O differential pair #0. It is the first differential pair in Gigabit Ethernet mode, and
the Transmit differential pair in 10/100 Mbps modes.
GBEx_MDI1+/GBEx_MDI1-: Ethernet Controller #x Media Dependent Interface (MDI) I/O differential pair #1. It is the second differential pair in Gigabit Ethernet mode,
and the Receive differential pair in 10/100 Mbps modes.
GBEx_MDI2+/GBEx_MDI2-: Ethernet Controller #x Media Dependent Interface (MDI) I/O differential pair #2. It is the third differential pair in Gigabit Ethernet mode; it
is not used in 10/100Mbps modes.
GBEx_MDI3+/GBEx_MDI3-: Ethernet Controller #x Media Dependent Interface (MDI) I/O differential pair #3. It is the fourth differential pair in Gigabit Ethernet mode; it
is not used in 10/100Mbps modes
SBC-C90
SBC-C90 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
On board, there are two Gigabit Ethernet connectors, for the direct connection of the SBC-C90
CN21
to two different wired LANs.
Signal
The Ethernet connection is managed directly by the Soc, through the 2x PCI-e x1 interfaces,
plus two dedicated Gigabit Ethernet Transceivers.
5
GBE1_MDI2-
First connection is available on connector CN21, and is always available, The
6
GBE1_MDI1-
second connection, available on RJ-45 connector CN22, instead, is available
7
GBE1_MDI3+
only as a factory option
8
GBE1_MDI3-
This interface is compatible both with Gigabit Ethernet (1000Mbps) and with Fast Ethernet
(10/100Mbps) Networks. They will configure automatically to work with the existing network.
CN22
Please be aware that it will work in Gigabit mode only in case that it is connected to Gigabit
Ethernet switches/hubs/routers. For the connection, cables category Cat5e or better are
Signal
required. Cables category Cat6 are recommended for noise reduction and EMC compatibility
5
GBE2_MDI2-
issues, especially when the length of the cable is significant.
6
GBE2_MDI1-
Placed behind each GbE connector there are also two bicolour Green/Yellow LEDs, signaling
100Mbps (green LED) / 1Gbps (yellow LED) connection and ACTIVITY presence (green LED).
7
GBE2_MDI3+
8
GBE2_MDI3-
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