USB and PCIe
PRELIMINARY INFORMATION
NVIDIA Jetson Orin NX DG-10931-001_v0.1 | 36
Module Pin
Name (Function)
CSI4_CLK_N/P
(PCIE2_CLK_N/P)
Differential Reference Clock Output: Connect to REFCLK_N/P
pins of PCIe device/connector
(PCIE2_CLKREQ*)
47kΩ pull-up to
VDD_3V3_SYS
on
PCIe Clock Request for PCIE1_CLK: Connect to CLKREQ pins on
device/connector(s)
(PCIE2_RST*)
4.7kΩ pull-up to
VDD_3V3_SYS
on
PCIe Reset: Connect to PERST pins on device/connector(s)
PCIe Interface 3 (x1 – Controller #9. Available if PCIe IF #2 is used as x1 only. Supports Endpoint only)
(PCIE3_TX0_N/P)
Capacitor
Differential Transmit Data Pair: Connect to TX_N/P pins of PCIe
connector or RX_N/P pin of PCIe device through AC cap according
to supported configuration.
(PCIE3_RX0_N/P)
capacitors near Jetson
Xavier NX pins or
device if device on
Differential Receive Data Pair: Connect to RX_N/P pins of PCIe
connector or TX_N/P pin of PCIe device through AC cap according
to supported configuration.
(PCIE3_CLK_N)
SDMMC_CLK
Differential Reference Clock Output: Connect to REFCLK_N/P
pins
(PCIE3_CLKREQ*)
47kΩ pull-up to
VDD_3V3_SYS
on
PCIe Clock Request for PCIE1_CLK: Connect to CLKREQ pins on
device/connector(s)
(PCIE3_RST*)
4.7kΩ pull-up to
VDD_3V3_SYS
on
PCIe Reset: Connect to PERST pins on device/connector(s)
47kΩ pull-up to
VDD_3V3_SYS
on
module
PCIe Wake: Connect to WAKE pins on device or connector. If the
module is configured as an Endpoint, include a isolator between
the wake pin on the module and the device/connector powered by
the 3.3V rail at the connector or device. The isolator should have
the output toward the connector or device. This isolates the on-
module pull-up resistors as well as ensures this signal will not be
pulled or driven high before the Root Port is powered on.
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