SBC-A62-J
SBC-A62-J User Manual - Rev. First Edition: 1.0 - Last Edition: 2.3 - Author: S.B. - Reviewed by N.P. Copyright © 2016 SECO S.r.l.
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3.3.5
Ethernet connector
On board, there is one Gigabit Ethernet connector, made available by
a Micrel KSZ9031RN Gigabit Ethernet Transceiver interfaced to NXP
processor
’
s RGMII interface.
Connector is type TRXCOM p/n TRJG16314CNL or equivalent, with
2kV decoupling capacitor, 100 Ohm impedance.
This interface is compatible both with Gigabit Ethernet (1000Mbps) and with Fast Ethernet
(10/100Mbps) Networks. It will configure automatically to work with the existing network.
Theoretical maximum speed of 1Gbps, however, cannot be reached, due to a known
limitation of i.MX6 Gb Ethernet MAC (ENET), which is limited only to 470Mbps (also check NXP Errata ERR004512 for i.MX6 processors).
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/GBE0_MDI0-: Ethernet Controller 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/GBE0_MDI1-: Ethernet Controller 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/GBE0_MDI2-: Ethernet Controller 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/GBE0_MDI3-: Ethernet Controller 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 - CN23
Pin Signal
Pin Signal
1
GB
5
GBE0_MDI2-
2
GBE0_MDI0-
6
GBE0_MDI1-
3
GB
7
GB
4
GB
8
GBE0_MDI3-
