Nvidia Jetson Orin NX User Manual

Miscellaneous Interfaces
PRELIMINARY INFORMATION
NVIDIA Jetson Orin NX DG-10931-001_v0.1 | 69
12.6 Debug
Jetson Orin NX supports a UART for debugging purposes. The UART intended for debug is
UART2.
Table 12-13. Jetson Orin NX Debug UART Pin Descriptions
Pin #
Module Pin
Name Orin Signal Usage and Description
Recommended
Usage Direction Pin Type
238 UART2_RXD GP11_UART3_TXD UART 2 receive
Debug UART
Input CMOS – 1.8V
236 UART2_TXD GP12_UART3_RXD UART 2 transmit Output
Note: In the Direction column, Output is from Jetson Orin NX. Input is to Jetson Orin NX. Bidir is for Bidirectional signals.
Table 12-14. Debug UART Connections
Module Pin Name Type Termination Description
UART2_TXD O UART #2 Transmit: Connect to RX pin of serial device
UART2_RXD I If level shifter implemented,
100kΩ to supply on the non-
Jetson Orin NX side of the device.
UART #2 Receive: Connect to TX pin of serial device
Figure 12-8. Debug UART Connections
Jetson
SoC
Level Shifter
VCCB
VCCA
B1
A1
B2A2
GNDOE
10 0k Ω
VDD_3V 3_SYSVDD_1V8
0.1uF
0.1uF
UART2_TXD
UART2_RXD
236
238
10 0k Ω
RXD_LS
TXD_L S
GP11_UART3_TXD
GP12_UART3_RXD
Note: If level shifter is implemented, pull-up is required on the RXD line on the non-Jetson Orin
NX side of the level shifter. This is required to keep the input from floating and toggling when no
device is connected to the debug UART.

Nvidia Jetson Orin NX Specifications

General

Brand	Nvidia
Model	Jetson Orin NX
Category	Computer Hardware
Language	English