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Table 11-7.
Jetson TX2 NX Fan Pin Description
Pin #
Module Pin Name
Tegra X2 Signal
GPIO_SEN6
230
GPIO14
208
GPIO08
UART5_TX
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 directions for GPIO14 and GPIO08 are true when used for those functions. Otherwise as GPIOs, the directions are
bidirectional.
Figure 11-6.
Jetson TX2 NX Fan Connections
Jetson
Tegra X2 – Fan
UART5_TX
UART
AO
GPIO_SEN6
11.5
UART
The Jetson TX2 NX brings three UARTs out to the main connector. See Figure 11-7 for typical
assignments of the three available UARTs.
Table 11-8.
Jetson TX2 NX UART Pin Description
Pin #
Module Pin Name
Tegra X2 Signal
UART2_TX
99
UART0_TXD
101
UART0_RXD
UART2_RX
UART2_RTS
103
UART0_RTS*
105
UART0_CTS*
UART2_CTS
UART3_TX
203
UART1_TXD
205
UART1_RXD
UART3_RX
UART3_RTS
207
UART1_RTS*
209
UART1_CTS*
UART3_CTS
UART1_TX
236
UART2_TXD
238
UART2_RXD
UART1_RX
Notes:
1.
Buffered on module to keep connected devices from affecting state of the pin during power-on as it is one of the SoC strap
pins. These pins can only be used as outputs if configured as GPIOs.
2.
In the Type/Dir column, Output is from Jetson TX2 NX. Input is to Jetson TX2 NX. Bidir is for Bidirectional signals.
3.
The directions for UART[2:0]x are true when used for those functions. Otherwise as GPIOs, the direction is bidirectional.
NVIDIA Jetson TX2 NX
Usage/Description
Fan PWM
Fan tachometer
VDD_5V_IN
VDD_1V8
10kΩ
G
GPIO08
FAN_TACH
208
VDD_5V_IN
GPIO14
FAN_PWM
230
G
Usage/Description
UART #0 Transmit. See note 1.
UART #0 Receive
UART #0 Request to Send. See note 1.
UART #0 Clear to Send
UART #1 Transmit. See note 1.
UART #1 Receive
UART #1 Request to Send
UART #1 Clear to Send
UART #2 Transmit.
UART #2 Receive
Miscellaneous Interfaces
Usage on DevKit
Carrier Board
Fan
SM2309
100uH
PSAC-TRG
S
D
BAT54C
G
VDD_5V_IN
D
DMN26
DOUFB4
S
10uF
0.1uF
D
DMN26
G
DOUFB4
D
S
DMN26
DOUFB4
S
Usage on DevKit
Carrier Board
M.2 Key E
Expansion Header
Debug Serial Port
DG-10141-001_v1.1 | 63
Direction Pin Type
Output
CMOS – 1.8V
Input
CMOS – 1.8V
Fan
Header
1
2
3
4
Direction
Pin Type
Output
Input
Output
Input
Output
CMOS – 1.8V
Input
Output
Input
Output
Input
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