Miscellaneous Interfaces
NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 75
Table 12-11. CAN Signal Connections
Module Pin Name Type Termination Description
CAN_TX O CAN Transmit: Connect to matching pin of device
CAN_RX I CAN Receive: Connect to Peripheral pin of device
12.5 Fan
Jetson Xavier NX provides PWM and Tachometer functionality for controlling a fan as part of
the thermal solution. Information on the PWM and Tachometer pins and functions can be
found in the following locations:
Jetson Xavier NX Pin Mux
• This is used to configure GPIO14 (PWM) for FAN_PWM and GPIO08 for FAN_TACH. The pin
used for
FAN_PWM is configured as GP_PWM6. The pin used for FAN_TACH is configured as
a GPIO.
Xavier (SoC) Technical Reference Manual (TRM)
• Functional descriptions and related registers can be found in the TRM for the FAN_PWM
(PWM chapter).
Table 12-12. Fan Pin Descriptions
Pin #
Module Pin
Name
Xavier Signal Usage/Description
Recommended
Usage
Directio
n
Pin Type
230 GPIO14 SOC_GPIO13 Fan PWM Fan Output
(note)
CMOS –
1.8V
208 GPIO08 SOC_GPIO22 Fan tachometer Fan Input
(note)
CMOS –
1.8V
Notes:
1. In the Type/Dir column, Output is from Jetson Xavier NX. Input is to Jetson Xavier NX. Bidir is for Bidirectional signals.
2. The direction indicated for GPIO014 and GPIO08 is associated with their use as Fan PWM/Tach. The pins support GPIO
functionality, so support both input and output operation (bidirectional).
Figure 12-7. Fan Connections
1
2
3
4
G
S
D
10 kΩ
10uF
Fan
Header
Jetson
SoC – Fan
SOC_GPIO13
AO
FAN_TACH
FAN_PWM
SOC_GPIO22
230
208
CAM
GP IO 08
GP IO 14
VDD_5V_IN
10 kΩ
G
S
D
0.1uF
BAT54 C
SM23 09
PSAC-TRG
DMN2 6
DO UFB 4
10 0uH
VDD_5V_IN
Lev el Shif ter
1.8V 5.0V
Lev el Shif ter
1.8V 5.0V
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