Digi ConnectCore

About the development board Ethernet 1 interface
ConnectCore for i.MX51 Hardware Reference Manual
82
The development board provides one 8-wire RJ-45 jack with integrated 1:1 transformers and
link/activity LEDs for the Ethernet 1 interface. This interface is attached to the Fast Ethernet
controller (FEC) of the i.MX51. The ConnectCore for i.MX51 module provides a 10/100 Ethernet PHY
chip for this interface.
The Ethernet 1 RJ-45 connector also supports 802.3af (PoE).
Ethernet 1, RJ-45 connector X7
The table below shows the pinout of the Ethernet 1 RJ-45 connector.
Pin Signal
802.3af End-Span
(mode A)
802.3ad Mid-Span
(mode B) Description
1 TXD+ Negative VPort Transmit data+
2 TXD- Negative V
Port
Trandmit data-
3 RXD+ Positive V
Port
Receive data+
4 EPWR+ Positive V
Port
Power from switch+
5 EPWR+ Positive V
Port
Power from switch+
6 RXD- Positive V
Port
Receive data-
7 EPWR- Negative V
Port
Power from switch-
8 EPWR- Negative V
portP
Power from switch-
The table below shows the description of the Ethernet 1 LEDs.
LED Description
Yellow Network activity (speed):
n Flashing - indicates network traffic
n Off - no network traffic
Green Network link:
n On - indicates an active network link
n Off - no network link present