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Chapter 14. Fan
Jetson AGX Xavier 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 AGX Xavier Module Pin Mux
This is used to configure the
•
configured as
Xavier Technical Reference Manual
Functional descriptions and related registers can be found in the TRM for the
•
FAN_PWM (PWM chapter) and FAN_TACH (Tachometer chapter) functions.
Jetson AGX Xavier Developer Kit Carrier Board Specification
The document contains the maximum current capability of the VDD_5V supply in the
•
Interface Power chapter. The fan is powered by this supply on the Jetson AGX Xavier
Developer Kit carrier board.
Table 14-1.
Jetson AGX Xavier Fan Pin Description
Module Pin
Pin #
SoC Signal
Name
K62
FAN_PWM
TOUCH_CLK
E54
FAN_TACH
SOC_GPIO22
Notes:
1.
In the Type/Dir column, Output is from Jetson AGX Xavier. Input is to Jetson AGX Xavier. Bidir is for Bidirectional signals.
2.
The direction indicated for FANx is associated with their use as Fan PWM/Tach. The pins support GPIO functionality, so support both input and
output operation (bidirectional).
Jetson AGX Xavier Series Product
:
FAN_PWM
. The
GP_PWM4
FAN_TACH
:
Usage/Description
Fan Pulse Width Modulation signal
Fan Tachometer signal
and
pins. The
FAN_TACH
pin is configured as
NV_THERM_FAN_TACH
:
Usage on NVIDIA
Carrier Board
Fan Circuit/Connector
Fan Circuit/Connector
pin is
FAN_PWM
.
Direction
Pin Type
Output
CMOS – 1.8V
Input
DG-09840-001_v2.5 | 114
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