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Table 6-12.
Ethernet MDI Interface Signal Routing Requirements
Parameter
Reference plane
Trace impedance (Diff pair / Single Ended)
Min trace spacing (pair-pair)
Max trace length/delay
Max within pair (intra-pair) skew
Number of vias
Table 6-13.
Ethernet Signal Connections
Module Pin Name
GBE_MDI[3:0]_N/P
GBE_LED_LINK
GBE_LED_ACT
NVIDIA Jetson TX2 NX
Requirement
GND
100 / 50
0.763
109 (690)
0.15 (1)
minimum
Type
Termination
DIFF
I/O
O
110Ω series resistor
O
110Ω series resistor
Units
Notes
Ω
±15%. Differential impedance target is 100Ω.
90Ω can be used if 100Ω is not achievable
mm
mm (ps)
mm (ps)
Ideally there should be no vias, but if required for
breakout to Ethernet controller or magnetics,
keep very close to either device.
Description
Gigabit Ethernet MDI IF Pairs: Connect to Magnetics -/+ pins
Gigabit Ethernet Link LED: Connect to green LED on RJ45
connector
Gigabit Ethernet Activity LED: Connect to yellow LED on RJ45
connector
USB and PCI Express
DG-10141-001_v1.1 | 29
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