Nvidia Jetson TX2 Manual page 16

w hich is floating on Jetson TX2 w ill be grounded on the Jetson TX2i as a means to differentiate betw een the tw o module types.
The module pow er configuration identification pin (
The updated carrier board, designed to support Jetson TX2i as w ell as Jetson TX2 w ill include logic that w ill use the state of the
MOD_PWR_CFG_ID
pin to determine how the P
module being installed, the
w ould be the case if a Jetson TX2 module is installed, a momentary pulse w ill be generated on the
module to initiate a pow er-on of the module. With either module type, if the system is already pow ered, a short press of the
pow er button w ill put the system in sleep mode (softw are dependent) if the system is "aw ake," w ake the system if in sleep mod e,
or cause a force pow er-off if the Pow er-on button is held low for approximately 8 to 10 seconds.
Figure 9. Power-on Type Detection & Control
From Module
MOD_PWR_CFG_ID
Strap (Pin B49)
From Module
CARRIER_PWR_ON
Pin (A48)
From Power
POWER_BTN
Button
From Module
WAKE_L
SYS_WAKE# (Pin
B48 – TX2i only)
Note The figure above is a high-level representation of the connections involved. Details will be provided in a future carrier
board reference design.
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618
MOD_PWR_CFG_ID
OWER_BTN#
POWER_BTN#
pin w ill be driven to a steady high (ON) or low (OFF) state. If the pin is floating as
VDD_19V_IN
VDD_19V_IN
VDD_19V_IN
D
G FET
D S
G FET
S
5V0_AO 5V0_AO
D
G FET
D S
G FET
S
D
G FET
S
MOD_PWR_ON_STATE_L
MOD_PWR_CFG_ID_L
D
G FET
S
5V0_AO
5V0_AO
) resides on the Module Pin B49.
signal is handled. If the pin is pulled dow n due to a Jetson TX2i
5V0_AO
TPS7A1650
IN OUT
EN PG
DELAY FB_NC
TPAD GND
5V0_AO
SRC0CS25D
VCC VCCLO*
ONOFF_CTLR_PBOUT
PSHOLD PBOUT
SR* EN/EN*
5V0_AO
PB* RST*
CSRD INT*
VREF GND
5V0_AO
5V0_AO
5V0_AO
5V0_AO 5V0_AO
5V0_AO
5V0_AO
D D
G FET G FET
S S
NVIDIA Jetson TX2/TX2i OEM Product Design Guide
POWER_BTN#
MOD_VIN_EN
5V0_AO
74LVC1G74
SD VCC
D Q
CP Q*
RD GND
POWER_ON
D
G FET
S
D
G FET
S
D
G FET
S
pin of the
To main input
power FET enable
circuit (TX2i only).
To Module
POWER_BTN#
Pin (B50)
16