Table 18 Gigabit Ethernet Signal Descriptions - Congatec COM Express conga-TR4 User Manual

Table 18 Gigabit Ethernet Signal Descriptions
Gigabit Ethernet Pin # Description
GBE0_MDI0+ A13 Gigabit Ethernet Controller 0: Media Dependent Interface Differential
GBE0_MDI0- A12 Pairs 0, 1, 2, 3. The MDI can operate in 1000, 100, and 10Mbit/sec
GBE0_MDI1+ A10 modes. Some pairs are unused in some modes according to the
GBE0_MDI1- A9 following:
GBE0_MDI2+ A7
GBE0_MDI2- A6
MDI[0]+/-
GBE0_MDI3+ A3
MDI[1]+/-
GBE0_MDI3- A2
MDI[2]+/-
MDI[3]+/-
GBE0_ACT# B2 Gigabit Ethernet Controller 0 activity indicator, active low.
GBE0_LINK# A8 Gigabit Ethernet Controller 0 link indicator, active low.
GBE0_LINK100# A4 Gigabit Ethernet Controller 0 100Mbit/sec link indicator, active low.
GBE0_LINK1000# A5 Gigabit Ethernet Controller 0 1000Mbit/sec link indicator, active low.
GBE0_CTREF A14 Reference voltage for Carrier Board Ethernet channel 0 magnetics
center tap. The reference voltage is determined by the requirements
of the module PHY and may be as low as 0V and as high as 3.3V. The
reference voltage output shall be current limited on the module. In
the case in which the reference is shorted to ground, the current shall
be limited to 250mA or less.
Note
The GBE0_LINK# output is only active during a 100Mbit or 1Gbit connection. It is not active during a 10Mbit connection. This is a limitation
of Ethernet controller since it only has 3 LED outputs, ACT#, LINK100# and LINK1000#. The GBE0_LINK# signal is a logic AND of the
GBE0_LINK100# and GBE0_LINK1000# signals on the conga-TR4 module.
Copyright © 2018 congatec AG
1000 100
B1_DA+/- TX+/-
B1_DB+/- RX+/-
B1_DC+/-
B1_DD+/-
I/O PU/PD Comment
I/O Twisted pair signals for external transformer.
Analog
10
TX+/-
RX+/-
O 3.3VSB
O 3.3VSB
O 3.3VSB
O 3.3VSB
Not connected
TR44m17 46/65