Fan; Figure 12-7. Fan Connections; Table 12-11. Can Signal Connections; Table 12-12. Fan Pin Descriptions - Nvidia Jetson Xavier NX Design Manual

Table 12-11. CAN Signal Connections

Module Pin Name
CAN_TX
CAN_RX
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
used for
FAN_PWM
a GPIO.
Xavier (SoC) Technical Reference Manual (TRM)

•
Functional descriptions and related registers can be found in the TRM for the
(PWM chapter).

Table 12-12. Fan Pin Descriptions

Module Pin
Pin # Xavier Signal
Name
230 GPIO14 SOC_GPIO13
208 GPIO08 SOC_GPIO22
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

Jetson
SoC – Fan
CAM
SOC_GPIO22
AO
SOC_GPIO13
NVIDIA Jetson Xavier NX
Type Termination
O
I
is configured as
GP_PWM6
Usage/Description
Fan PWM
Fan tachometer
GPIO08 FAN_TACH
208
GPIO14 FAN_PWM
230
Description
CAN Transmit: Connect to matching pin of device
CAN Receive: Connect to Peripheral pin of device
and GPIO08 for
FAN_PWM
. The pin used for
SM2309
100uH
PSAC-TRG
VDD_5V_IN
S D
BAT54C
G
Level Shifter
1.8V 5.0V
Level Shifter
G
1.8V 5.0V
Miscellaneous Interfaces
. The pin
FAN_TACH
is configured as
FAN_TACH
FAN_PWM
Recommended Directio
Usage n
Fan Output
(note)
Fan Input
(note)
VDD_5V_IN
Fan
Header
1
10uF 0.1uF
2
3
D 4
DMN26
DOUFB4
S
DG-09693-001_v1.7 | 75
Pin Type
CMOS –
1.8V
CMOS –
1.8V