Nvidia Jetson Orin Nano Series User Manual

Power
PRELIMINARY INFORMATION
Jetson Orin NX Series and Jetson Orin Nano Series DG-10931-001_v1.1 | 21
6.1.1 Power Button Supervisor MCU Power-On
The NVIDIA carrier board reference design implements a power button supervisor. This
supervisor is a low power device meant to intercept push-button (momentary) switches to
control ON/Enable signals to the module Power Sequencer or PMIC and main processor. This
supervisor is always powered and allows close to complete system power OFF while providing
proper timing for ON/OFF signals to the system. The selected MCU to perform this function is
the EFM8SB10F2G-A-QFN20 from Silicon Labs.
Note: Designs that intend to follow the NVIDIA carrier board design and include the
EFM8SB10F2G-A-QFN20 MPU for Power Button control need to replicate the circuitry on the
latest P3768 carrier board exactly. NVIDIA provides the binary and source on the Jetson
Download Center. The customer should get the flashing instructions from Silicon Labs.
Otherwise, another solution designed to meet the requirements earlier in this chapter can be
used.
Table 6-2. Power Button Supervisor Control Signals
Button MCU
Signal Name
Associated Orin
Module Pin
Name
Associated
Module Pin
#
I/O Type
Trigge
r Level
Drive
Mode
Description
MCU Pin
BMCU_PWR_BTN*
SLEEP/WAKE*
240
Input
(debounced)
Level
OD
(HiZ)
Power Button
P0.0
BMCU_P01
10k Pull-up to 3V3_AO
P0.1
BMCU_P02
10k Pull-up to 3V3_AO
P0.2
BMCU_P03
No Connect
P0.3
BMCU_UART_TX
PP
Test point for FW debug
P0.4
BMCU_P05
No Connect
P0.5
BMCU_ACOK
Input
(debounced)
Edge
OD
(HiZ)
Determine when VDD_5V_SYS
power is supplied. Used to
select either button power on
or auto-power on.
P0.6
BMCU_GOOD
Input
Level
OD
(HiZ)
10k Pull-up to 3V3_AO
P0.7
FORCE_OFF*
SHUTDOWN_
REQ*
233
Input
Level
OD
(HiZ)
Triggers shutdown sequence
P1.0
BUCK_3V3_EN
SYS_RESET*
239
Input
Edge
OD
(HiZ)
Carrier board supply enable
P1.1
BMCU_BRD_SEL
Input
OD
(HiZ)
10k Pull-up to 3V3_AO
P1.2
VIN_PWR_ON
Output
PP
Enables power to module if
wide range (5V-20V)
P1.3
BMCU_POWER_EN
POWER_EN
237
Output
PP
Power On/Off control to Power
Sequencer/PMC. Also Enable
input to main 5V supply
(VDD_5V)
P1.5
PWR_BTN_BUF*
No Connect
P1.6
BMCU_P17
No Connect
P1.7
BMCU_C2D
Data for programming/debug
P2.7_C2
D

Nvidia Jetson Orin Nano Series Specifications

General

Brand	Nvidia
Model	Jetson Orin Nano Series
Category	Control Unit
Language	English