SBC-992-pITX
SBC-992-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G Copyright © 2016 SECO S.r.l.
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3.3
Connectors description
3.3.1
Ethernet connectors
On board, there can be up to two Gigabit Ethernet
connections, for the use of up to two different LANs. Both
connections use a dedicated Realtek RTL8111F (or
equivalent) controller.
Please consider that first Gigabit Ethernet is always available
(on dedicated connector CN8), while the second Gigabit
Ethernet controller (on dedicated connector CN9) is optional, it
depends on the version of SBC-992-pITX module purchased.
Both connectors are RJ-45 sockets type LINK-PP p/n LPJG16314A4NL or equivalent, with
2kV decoupling capacitor, 100 Ohm impedance.
On the connectors there are also two bicolor Green/Yellow LEDs: LED1 (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. LED2 (Right
LED) 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.
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 #0 - CN8
Pin Signal
Pin Signal
1
GB
5
GBE0_MDI2-
2
GBE0_MDI0-
6
GBE0_MDI1-
3
GB
7
GB
4
GB
8
GBE0_MDI3-
Optional Gigabit Ethernet Port #1 - CN9
Pin
Signal
Pin
Signal
1
GB
5
GBE1_MDI2-
2
GBE1_MDI0-
6
GBE1_MDI1-
3
GB
7
GB
4
GB
8
GBE1_MDI3-
