SBC-C61
SBC-C61 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by N.P. - Copyright © 2021 SECO S.p.A.
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3.3
Connectors description
3.3.1
Gigabit Ethernet connectors
On board, there are up to two Gigabit Ethernet connector, for the direct
connection of the SBC-C61 to two different wired LANs.
The first Ethernet connection is realised by using Texas Instrument
DP83867CRRGZR 10Base-T/100Base-Tx/1000Base-Tx Ethernet PHY
Transceiver interfaced to NXP processor
’
s eNET interface.
The second Ethernet connection is realised by using Intel
®
I210 family Gigabit Ethernet
controller interfaced to NXP processor
’
s PCI-e interface.
First connection is available on connector CN31, and it is always available. The second
connection, available on RJ-45 connector CN38, instead, is available only as a factory option.
The connectors are type TRXCOM p/n TRJG16314A4NL or equivalent, with 2kV decoupling
capacitor, 100 Ohm impedance.
These interfaces are compatible both with Gigabit Ethernet (1000Mbps) and with Fast Ethernet
(10/100Mbps) Networks. They will configure automatically to work with the existing network.
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
required. Cables category Cat6 are recommended for noise reduction and EMC compatibility
issues, especially when the length of the cable is significant.
On the connectors there are also two bicolor (Green /Yellow) LEDs for each port. Left LED shows 10/100 or 1000 connection: green means 100Mbps connection,
yellow means 1000Mpbs connection, when the LED is Off then 10Mpbs or no connection is available. The right LED blinks Green to show ACTIVITY presence.
GB/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.
GB/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.
GB/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.
GB/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.
Gigabit Ethernet Port #1 CN31
Pin Signal
Pin Signal
1
GB
5
GBE1_MDI2-
2
GBE1_MDI0-
6
GBE1_MDI1-
3
GB
7
GB
4
GB
8
GBE1_MDI3-
Optional Gigabit Ethernet Port #2 CN38
Pin
Signal
Pin
Signal
1
GB
5
GBE2_MDI2-
2
GBE2_MDI0-
6
GBE2_MDI1-
3
GB
7
GB
4
GB
8
GBE2_MDI3-
