Nvidia JETSON XAVIER NX

Gigabit Ethernet
NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 37
Table 7-2. Ethernet MDI Interface Signal Routing Requirements
Parameter
Requirement
Units
Notes
Reference plane GND
Trace impedance Diff pair / Single Ended 100 / 50 Ω ±15%. Differential impedance target is
100Ω. 90Ω can be used if 100Ω is not
achievable
Min trace spacing (pair-pair) 0.763 mm
Max trace length/delay 109 (690) mm (ps)
Max within pair (intra-pair) skew 0.15 (1) mm (ps)
Number of vias minimum
Ideally there should be no vias, but if
required for breakout to Ethernet
controller or magnetics, keep very
close to either device.
Notes: Xavier does not support delay/skewing of clock vs data. This must be enabled in the PHY.
Table 7-3. Ethernet Signal Connections
Module Pin Name
Type
Termination
Description
GBE_MDI[3:0]_N/P DIFF
I/O
Gigabit Ethernet MDI IF Pairs: Connect to Magnetics -/+ pins
GBE_LED_LINK O
110Ω (minimum) series
resistor
Gigabit Ethernet Link LED: Connect to green LED cathode on RJ45
connector. Anode connected to VDD_3V3_SYS
GBE_LED_ACT O 110Ω (minimum) series
resistor
Gigabit Ethernet Activity LED: Connect to yellow LED cathode on
RJ45 connector. Anode connected to VDD_3V3_SYS