Nvidia Jetson TX2 NX User Manual

Miscellaneous Interfaces
NVIDIA Jetson TX2 NX DG-10141-001_v1.1 | 64
Figure 11-7. Jetson TX2 NX UART Connections
Jetson
Tegra – UART
UART2_TX
UART2_RX
UART2_RTS
UART 2_CTS
UART
Routed to Debug
Serial Port on DevKit
UART0_TXD
UART0_RXD
UART0_RTS*
UART0_CTS*
UART1_TXD
UART1_RXD
UART1_RTS*
UART1_CTS*
UART2_TXD
UART2_RXD
UART1_TX
UART1_RX
DEBUG
UART3_TX
UART3_RX
UART3_RTS
UART 3_CTS
AO
205
203
236
238
101
99
103
105
207
209
Routed to 40-pin Expansion
Header on DevKit
Routed to M.2 Key E
Connector on DevKit
GND
OE*
VCC
GND
OE*
VCC
GND
OE*
VCC
1.8V
1.8V
1.8V
Table 11-9. UART Signal Connections
Ball Name Type Termination Description
UART[2:0]_TXD O UART Transmit: Connect to peripheral RXD pin of device
UART[2:0]_RXD I UART Receive: Connect to peripheral TXD pin of device
UART[1:0]_CTS* I UART Clear to Send: Connect to peripheral RTS pin of device
UART[1:0]_RTS* O UART Request to Send: Connect to peripheral CTS pin of device
11.6 Debug
Jetson TX2 NX supports a UART for debugging purposes. The UART intended for debug is
UART1 with is routed to a level shifter then to a 6-pin UART header on the developer kit carrier
board.
Table 11-10. Jetson TX2 NX Debug UART Description
Pin #
Module Pin Name
(See Note)
Tegra X2 Signal Usage/Description
Usage on DevKit
Carrier Board
Direction Pin Type
238 UART2_RXD UART1_RX UART 2 receive
Serial port
Input CMOS – 1.8V
236
UART2_TXD
UART1_TX
UART 2 transmit
Output
Notes:
1. In the Type/Dir column, Output is from Jetson TX2 NX. Input is to Jetson TX2 NX. Bidir is for Bidirectional signals.
2. The direction for UART2_RXD is true when used for this function. Otherwise as a GPIO, the direction is bidirectional.

Nvidia Jetson TX2 NX Specifications

General

Brand	Nvidia
Model	Jetson TX2 NX
Category	Computer Hardware
Language	English