CCOMe-C30
CCOMe-C30 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by F.B. Copyright © 2019 SECO S.p.A.
39
3.3.10
Dual Gigabit Ethernet connector
On board, there are is a dual Gigabit Ethernet RJ-45 connector for the connection to up to two
different LAN ports.
The connector is a double port RJ-45 socket type
TRXCOM p/n TRJG27420AINL or equivalent, with
2kV decoupling capacitors.
On the connectors there are also two LEDs for
each port. Left LED is bicolor (Green /Yellow) and
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 is
Green and shows ACTIVITY presence.
These two 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 they will work in Gigabit mode only in case that they are 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.
CN21 provide direct access to the Gigabit Ethernet signals directly managed by the COM Express modules (indicated as GBE0_xxx), while the second Gigabit
Ethernet interface, indicated as GBE1_xxx, is managed by a dedicated Intel
®
I210AT or equivalent controller, interfaced to PCI-express lane #0, coming out from
COM Express connector
’
s rows A-B..
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 Ports #0 #1- CN21
Pin Signal
Pin Signal
A1
GB
A5
GBE0_MDI2-
A2
GBE0_MDI0-
A6
GBE0_MDI1-
A3
GB
A7
GB
A4
GB
A8
GBE0_MDI3-
B1
GB
B5
GBE1_MDI2-
B2
GBE1_MDI0-
B6
GBE1_MDI1-
B3
GB
B7
GB
B4
GB
B8
GBE1_MDI3-
