NVIDIA Jetson TX2/TX2i OEM Product Design Guide
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618
19
Touch Interrupt (TOUCH_INT)
GPIO6_TOUCH_INT
51
USB VBUS Detect (USB_VBUS_DET)
USB0_VBUS_DET
53
GPIO Expansion 0 Interrupt (GPIO_EXP0_INT)
GPIO_EXP0_INT
54
Modem Wake AP (MDM_WAKE_AP)
GPIO16_MDM_WAKE_AP
55
Battery Low (BATLOW#)
BATLOW#
56
GPIO Expansion 1 Interrupt (GPIO_EXP1_INT)
GPIO_EXP1_INT
58
USB Vbus Enable 0 (USB_VBUS_EN0)
USB_VBUS_EN0
61
USB Vbus Enable 1 (USB_VBUS_EN1)
USB_VBUS_EN1
62
Ambient Light Proximity Interrupt (ALS_PROX_INT)
GPIO8_ALS_PROX_INT
63
Modem Coldboot (MDM_COLDBOOT)
GPIO18_MDM_COLDBOOT
64
Force Recovery (FORCE_RECOV#)
FORCE_RECOV#
67
Sleep (SLEEP_L)
SLEEP#
68
Figure 14. Deep Sleep (SC7) Entry/Exit Sequence
CARRIER_PWR_ON
VIN_PWR_BAD#
VDD_IN
RESET_OUT#
SC7 Entry
SC7 Exit
CARRIER_STBY#
(Tegra X2 SOC_PWR_REQ)
VDD_3V3_SLP
VDD_5V0_SLP
VDD_12V_SLP
VDD_5V0_HDMI_CON
SC7 Entry/Exit Trigger
Carrier Board VDD_1V8
3.8 Optional Auto-Power-On Support
Jetson TX2 and Jetson TX2i both optionally support Auto-Pow er-On. This allow s the platform to pow er on w hen VDD_IN is first
pow ered, instead of w aiting for a pow er button press. For Jetson TX2, to enable this feature, the CHARGER_PRS NT# pin
should be tied to GND. For Jetson TX2i, w hich uses a different PMIC, the POWER_BTN# pin needs to be held high. As there
is a pull-up on the module, the POWER_BTN# pin can be left floating on the carrier board. If a design w ill support both Jetson
TX2 and Jetson TX2i and needs to pow er on w ithout a button press (Auto-Pow er-On), the CHARGER_PRSNT# pin should be
tied to GND, and the POWER_BTN# pin should be left unconnected.
3.8.1 Jetson TX2 Auto-Power-On Details
This section provides guidance for modifying a carrier board design to pow er the platform on w hen VDD_IN is first pow ered,
instead of w aiting for a pow er button press. In order to pow er the system on w ithout a pow er button, a specific sequence is
required betw een the time the VDD_IN pow er is connected and the CHARGER_PRSNT# pin on the module is driven low . The
CHARGER_PRSNT# pin connects to the module PMIC and requires a minimum delay of 300ms from the point VDD_IN reaches
its minimum level (5.5V) before it can be driven low . Jetson TX2/TX2i includes circuitry on the module to support Auto-Pow er-
On. In order to enable this feature, the CHARGER_PRSNT# pin should be tied to GND.
