Table 7-2. Ethernet Mdi Interface Signal Routing Requirements; Table 7-3. Ethernet Signal Connections - Nvidia Jetson Xavier NX Design Manual

Table 7-2. 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
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
GBE_MDI[3:0]_N/P DIFF
I/O
GBE_LED_LINK O
GBE_LED_ACT O
NVIDIA Jetson Xavier NX
Requirement
GND
100 / 50
0.763
109 (690)
0.15 (1)
minimum
Termination Description
Gigabit Ethernet MDI IF Pairs: Connect to Magnetics -/+ pins
110Ω (minimum) series Gigabit Ethernet Link LED: Connect to green LED cathode on RJ45
resistor connector. Anode connected to VDD_3V3_SYS
110Ω (minimum) series Gigabit Ethernet Activity LED: Connect to yellow LED cathode on
resistor RJ45 connector. Anode connected to VDD_3V3_SYS
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.
DG-09693-001_v1.7 | 37
Gigabit Ethernet