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Chapter 5. Power
Power for the module is supplied on the
NX Data Sheet
for supply tolerance and maximum current).
!
CAUTION: Jetson TX2 NX is not hot-pluggable. When installing the module, the main power
supply should not be connected. Before removing the module, the main power supply (to
pins) must be disconnected and allowed to discharge below 0.6V.
Table 5-1.
Jetson TX2 NX Power and System Pin Descriptions
Pin #
Module Pin
Tegra X2 Signal
Name
251
VDD_IN
−
↓
260
235
PMIC_BBAT
−
214
FORCE_
BUTTON_VOL_UP
RECOVERY*
240
SLEEP/WAKE*
BUTTON_PWR_ON Sleep/Wake. Configured as GPIO for optional use to
233
SHUTDOWN_
−
REQ*
237
POWER_EN
(PMIC EN0
through converter
logic)
239
SYS_RESET*
SYS_RESET_IN_N
178
MOD_SLEEP*
GPIO_PA6
NVIDIA Jetson TX2 NX
pins and is nominally 5.0V (see the
VDD_IN
Usage/Description
Main power – Supplies PMIC and other regulators
PMIC Battery Back-up. Optionally used to provide back-up
power for the Real-Time-Clock (RTC). Connects to
Lithium Cell or super capacitor on Carrier Board. PMIC is
source when charging cap or coin cell. Super cap or coin
cell is source when system is disconnected from power.
Charging is enabled by default in software. If non-
rechargeable battery is to be used, charging should be
disabled.
Force Recovery strap pin. Held low when SYS_RESET*
goes high (i.e. during power-on) places system in USB
recovery mode.
indicate the system should enter or exit sleep mode.
Used by the module to request the carrier board to shut
down. ~5kΩ pull-up to VDD_IN (5V) on the module.
Signal for module on/off: high level on, low level off.
Connects to module PMIC EN0 through converter logic.
POWER_EN is routed to a Schmitt trigger buffer on the
module. 100kΩ pulldown on the module.
Module Reset. Reset to the module when driven low by the
carrier board. Used as carrier board supply enable when
driven high by the module when module power sequence
is complete. Used to ensure proper power on/off
sequencing for between module and carrier board
supplies. 10kΩ pull-up to 1.8V on the module.
Module Sleep. When active (low), indicates module has
gone to Sleep (SC7) mode. This pin is controlled by system
software and should not be modified.
Jetson TX2
VDD_IN
Usage on DevKit
Direction Pin Type
Carrier Board
Main DC input
Input
5.0V
Battery Back-up
Bidir
Input
using Super-
Range:
capacitor
1.65V-5.5V
Output
Options:
2.5V, 3.0V,
3.3V, 3.5V
Automation header Input
CMOS –
1.8V
Automation header Input
CMOS –
5.0V
System
Output
Open Drain,
5.0V
System
Input
Analog 5.0V
Automation header Bidir
Open Drain,
1.8V
HDMI termination
Output
CMOS –
pull-down FET
1.8V
control disable
DG-10141-001_v1.1 | 11
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