Nvidia JETSON NANO Product Design Guide

Miscellaneous Interfaces
NVIDIA Jetson Nano DG-09502-001_v2.1 | 58
Figure 11-1. I2C Connections
Jetson
Tegra
– I2C
PWR_I2C_SCL
PWR_I2C_SDA
CAM_I2C_SCL
CAM_I2C_SDA
SYS
GEN3_I2C_SCL
GEN3_I2C_SDA
On-Module
Usage Only
VDD_1V8
CAM
DMIC
GEN1_I2C_SCL
GEN1_I2C_SDA
UART
GEN2_I2C_SCL
GEN2_I2C_SDA
VDD_3V3_SYS
2. 2kΩ
2. 2kΩ
VDD_1V8
2. 2kΩ
2. 2kΩ
VDD_3V3_SYS
2. 2kΩ
2. 2kΩ
VDD_3V3_SYS
2. 2kΩ
2. 2kΩ
Used as camera module control interface
or available for misc. 3.3V I2C devices.
CAM_I2C_SCL
CAM_I2C_SDA
I2C2_SCL
I2C2_SDA
I2C0_SCL
I2C0_SDA
I2C1_SCL
I2C1_SDA
Avai lable for misc. 1.8V I2C device s
Avai lable for misc. 3.3V I2C device s
Avai lable for misc. 3.3V I2C device s
215
213
232
234
185
187
189
191
Note: If an I2C interface is routed to an M.2 Key E or M.2 Key M socket, it is recommended that
0Ω series resistors be included on the lines. If the design will be used with WiFi modules that
require I2C then the 0Ω series resistors would be installed. However, the WiFi modules must be
fully spec compliant and not hold the I2C lines low during boot, which could interfere with
communications with other devices on this I2C bus and possibly prevent the system from
booting.
11.1.1 I2C Design Guidelines
Care must be taken to ensure I2C peripherals on same I2C bus connected to Jetson Nano do
not have duplicate addresses. Addresses can be in two forms: 7-bit, with the read/write bit
removed or 8-bit including the read/write bit. Be sure to compare I2C device addresses using
the same form (all 7-bit or all 8-bit format). The I2C2 interface is connected to an EEPROM on
the module which uses I2C address 7’h50. The CAM_I2C interface is connected to the power
monitor device on the module which uses I2C address 7’h40.
Notes:
• The Jetson Nano I2C interfaces have 2.2kΩ pull-ups on the module. Pads for additional pull-
ups are recommended in case a stronger pull-up is required due to additional loading on the
interfaces.
• The I2C pad LPMD bit is set by default for the I2C[2:0] pins, but not for the CAM_I2C pins.
These settings can be changed if necessary, to improve signal integrity.

Nvidia JETSON NANO Specifications

General

Brand	Nvidia
Model	JETSON NANO
Category	Microcontrollers
Language	English