Nvidia JETSON XAVIER NX

USB and PCIe
NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 19
Pin #
Module Pin
Name
Xavier Signal Usage/Description
Recommended
Usage
Directio
n
Pin Type
161 USBSS_RX_N PEX_RX1_N
USB 3.2 Receive (USB 3.2 Ctrl #2)
USB 3.2
connector,
device or hub
Input
USB 3.2
PHY
163 USBSS_RX_P PEX_RX1_P
166 USBSS_TX_N PEX_TX1_N
USB 3.2 Transmit (USB 3.2 Ctrl #2) Output
USB 3.2
PHY
168 USBSS_TX_P PEX_TX1_P
Notes:
1. In the Type/Dir column, Output is from Jetson Xavier NX. Input is to Jetson Xavier NX. Bidir is for Bidirectional signals.
2. The direction shown in this table for PEX_L4_RST* and PCIE_WAKE* signals is true when used for those PCIe functions.
Otherwise, if used as GPIOs, the direction is bidirectional.
Table 6-3 shows the mapping options for Jetson Xavier NX.
Table 6-3. USB 3.2 and PCIe Lane Mapping
Module Pin Names PCIE0_RX3_N/
P
PCIE0_TX3_N/
P
PCIE0_RX2_N/
P
PCIE0_TX2_N/
P
PCIE0_RX1_N/
PPCIE0_TX1_
N/P
PCIE0_RX0_N/
PPCIE0_TX0_
N/P
PCIE1_RX0_N/P
PCIE1_TX0_N/P
USBSS_RX_N/P
Xavier Lanes
NVHS0 Lane 3
NVHS0 Lane 2
NVHS0 Lane 1
NVHS0 Lane 0
PEX Lane 11
PEX Lane 1
USB 3.2 PCIe
1 1x4 + 1x1 PCIe 0 lane 3
Controller #5
PCIe 0 lane 2
Controller #5
PCIe 0 lane 1
Controller #5
PCIe 0 lane 0
Controller #5
PCIe 1 lane 0
Controller #4
USB_SS Port #2
Recommended Usage PCIe x4 connector or device (i.e. M.2 Key M)
PCIe x1 connector
or device (i.e. M.2
Key E)
USB 3.2
connector, device
or hub
6.1 USB
Jetson Xavier NX support s up to three USB 2.0 ports and a single USB 3.2 port. Two examples
are shown in Figure 6-1 and Figure 6-2.
Note: Some non-compliant USB 3.x devices will not function correctly unless USB 3.2 Gen2 is
disabled.
The example shown in Figure 6-1 is for connections to a USB device only connector to be used
to support recovery mode (See Section 12.7 for details on recovery mode) or a USB device if
booted normally. A USB Micro B connector is shown in the example.