Table 7-10. Pcie Signal Connections - Nvidia Jetson Orin NX Design Manual

Table 7-10. PCIe Signal Connections
Module Pin
Name (Function)
PCIe Interface 0 (x4 – Controller #4, Root Port or Endpoint)
PCIE0_TX3_N/P DIFF OUT
PCIE0_TX2_N/P
PCIE0_TX1_N/P
PCIE0_TX0_N/P
PCIE0_RX3_N/P DIFF IN
PCIE0_RX2_N/P
PCIE0_RX1_N/P
PCIE0_RX0_N/P
PCIE0_CLK_N/P
Root Port DIFF OUT
Endpoint DIFF IN
PCIE0_CLKREQ*
Root Port
Endpoint
PCIE0_RST*
Root Port
Endpoint
PCIe Interface 1 (x1 – Controller #1, Root Port only)
PCIE1_TX0_N/P DIFF OUT
PCIE1_RX0_N/P DIFF IN
PCIE1_CLK_N/P DIFF OUT
PCIE1_CLKREQ* I/O (Root Port)
I (Endpoint)
PCIE1_RST* O (Root Port)
I (Endpoint)
PCIe Interface 2 (x1 or x2 – Controller #7. Root Port only)
CSI4_D3_N/P DIFF OUT
(PCIE2_TX1_N/P)
CSI4_D0_N/P
(PCIE2_TX0_N/P)
CSI4_D1_N/P DIFF IN
(PCIE2_RX1_N/P)
CSI4_D2_N/P
(PCIE2_RX0_N/P)
PRELIMINARY INFORMATION
NVIDIA Jetson Orin NX
Type Termination
Series 0.22uF
Capacitor
Series 0.22uF
capacitors near Jetson
Orin NX pins or device
if device on main PCB.
47kΩ pull-up to
I VDD_3V3_SYS on
O module
4.7kΩ pull-up to
O VDD_3V3_SYS on
I module
Series 0.22uF
Capacitor
Series 0.22uF
capacitors near Jetson
Orin NX pins or device
if device on main PCB.
47kΩ pull-up to
VDD_3V3_SYS on
module
4.7kΩ pull-up to
VDD_3V3_SYS on
module
Series 0.22uF
Capacitor
Series 0.22uF
capacitors near Jetson
Xavier NX pins or
device if device on
main PCB.
Description
Differential Transmit Data Pairs: Connect to TX_N/P pins of PCIe
connector or RX_N/P pin of PCIe device through AC cap according
to supported configuration.
Differential Receive Data Pairs: Connect to RX_N/P pins of PCIe
connector or TX_N/P pin of PCIe device through AC cap according
to supported configuration.
Differential Reference Clock Output: Connected to a mux on the
module that selects either SF_PCIE10_CLK or UPHY2_REFCLK2.
Connect to REFCLK_N/P pins of PCIe device/connector. For Root
Port operation, set the mux to select SF_PCIE10_CLK (GP21 = 0).
For Endpoint, set the mux to select UPHY2_REFCLK2 (GP21 = 1).
PCIe Clock Request for PCIE0_CLK: Connect to CLKREQ pins on
device or connectors. If the module is configured as an Endpoint,
include isolation between the clock request pin on the module and
the device/connector. One isolator should have the output to the
module and be powered by the 3.3V rail on the module. The other
isolator should have the output pointing at the connector or device
and be powered by the 3.3V rail at the connector or device. These
isolate the on-module pull-up resistors as well as ensures the
pins on both the Root Port and Endpoint sides will not be driven
high before the associated power is enabled.
PCIe Reset: Connect to PERST pins on device/connector(s). If the
module is configured as an Endpoint, include a isolator between
the reset 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 module. This isolates the on-module pull-up
resistor as well as ensures this signal will not be pulled or driven
high before the module is powered on.
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.
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.
Differential Reference Clock Output: Connect to REFCLK_N/P
pins of PCIe device/connector
PCIe Clock Request for PCIE1_CLK: Connect to CLKREQ pins on
device/connector(s)
PCIe Reset: Connect to PERST pins on device/connector(s)
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.
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.
USB and PCIe
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