Ethernet Mdi Routing Guidelines; Figure 8-2. Gigabit Ethernet Magnetics And Rj45 Connections; Table 8-2. Ethernet Mdi Interface Signal Routing Requirements; Table 8-3. Ethernet Signal Connections - Nvidia Jetson Orin NX Series Product Manual

Figure 8-2. Gigabit Ethernet Magnetics and RJ45 Connections
GBE_MDI0_P
GBE_MDI0_N
GBE_MDI1_P
GBE_MDI1_N
GBE_MDI2_P
GBE_MDI2_N
GBE_MDI3_P
GBE_MDI3_N
0.05Ω
0.05Ω
Place resistors &
0.05Ω
capacitor around
chassis GND shape
100pF
0.05Ω
0.05Ω
0.05Ω
GBE_LED_LINK
GBE_LED_ACT
8.1.1

Ethernet MDI Routing Guidelines

The following tables describes the ethernet signal routing requirements and connections.
Table 8-2. 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
Max pair to pair (inter-pair skew)
Number of vias
Notes: NVIDIA Orin does not support delay or skewing of clock vs. data. This must be enabled in the PHY.
Table 8-3. Ethernet Signal Connections
Module Pin Name Type
GBE_MDI[3:0]_N/P DIFF
I/O
GBE_LED_LINK O
GBE_LED_ACT O
PRELIMINARY INFORMATION
Jetson Orin NX Series and Jetson Orin Nano Series
MD0+
MD0-
MD1+
MCT
MD1-
MD2+
MD2-
MD3+
MD3-
POE_VC1 VC1
VC2
POE_VC2 VC3
VC4
POE_VC3
22nF
POE_VC4
each
each
1000pF
VDD_3V3_SYS
110Ω
110Ω
Requirement
GND
100 / 50
0.763
109 (690)
0.15 (1)
0.22 (1.5)
minimum
Termination Description
Gigabit Ethernet MDI IF Pairs: Connect to Magnetics -/+ pins
Gigabit Ethernet Link LED: Connect to green LED cathode on RJ45
resistor
connector. Anode connected to VDD_3V3_SYS
Gigabit Ethernet Activity LED: Connect to yellow LED cathode on
resistor
RJ45 connector. Anode connected to VDD_3V3_SYS
J1
(J8) TXD3-
(J7) TXD3+
J2
(J6) TXD1-
(J5) TXD2-
J3
(J4) TXD2+
(J3) TXD1+
J6
(J2) TXD0-
(J1) TXD0+
J4
J5
J7
J8
0.1uF
Units Notes
mm
mm (ps)
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.
Gigabit Ethernet
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