Table 24 Gigabit Ethernet Signal Descriptions - Congatec COM Express conga-TCV2 User Manual

Table 24 Gigabit Ethernet Signal Descriptions
Gigabit Ethernet Pin # Description
GBE0_MDI0+ A13 Gigabit Ethernet Controller 0: Media Dependent Interface
GBE0_MDI0- A12 Differential Pairs 0, 1, 2, 3. The MDI can operate in 1000, 100, and 10
GBE0_MDI1+ A10 Mb/s modes. Some pairs are unused in some modes according to
GBE0_MDI1- A9 the following:
GBE0_MDI2+ A7
GBE0_MDI2- A6
GBE0_MDI3+ A3 MDI[0]+/-
GBE0_MDI3- A2
MDI[1]+/-
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 0 100 Mb/s link indicator, active low
GBE0_LINK1000# A5 Gigabit Ethernet Controller 0 1000 Mb/s 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 0 V and as high as 3.3 V.
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 250 mA or less.
Note
1. The GBE0_LINK# output is not active during a 10 Mb connection. It is only active during a 100 Mb, 1 Gb or 2.5 Gb 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-TCV2 module.
2.
The LINK1000# output is active during 1 Gb and 2.5 Gb connection
3.
The ACT# output is active during LINK#, LINK100# and LINK1000# (all speed). The LEDs blink when an activity is detected.
4.
Copyright © 2021 congatec GmbH
1000 100
B1_DA+/- TX+/-
B1_DB+/- RX+/-
B1_DC+/-
B1_DD+/-
I/O PU/PD Comment
I/O Analog Twisted pair signals for external
transformer.
10
TX+/-
RX+/-
O 3.3 VSB
O 3.3 VSB
O 3.3 VSB
O 3.3 VSB
Not connected
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