Nvidia Jetson TX2 NX User Manual

Miscellaneous Interfaces
NVIDIA Jetson TX2 NX DG-10141-001_v1.1 | 59
Table 11-2. I2C Interface Signal Routing Requirements
Parameter Requirement Units Notes
Max frequency Standard-
mode / Fm / Fm+
100 / 400 / 1000 kHz See Note 1
Topology Single ended, bi-directional, multiple masters/slaves
Max loading Standard-
mode / Fm / Fm+
400 pF Total of all loads
Reference plane
GND
or
PWR
Trace impedance 50 – 60 Ω ±15%
Trace spacing 1x dielectric
Max trace length/delay
Standard Mode
Fm, Fm+ Modes
3400 (~20)
1700 (~10)
ps (in)
Notes:
1. Fm = Fast-mode, Fm+ = Fast-mode Plus.
2. Avoid routing I2C signals near noisy traces, supplies or components such as a switching power regulator.
3. No requirement for decoupling caps for PWR reference.
Table 11-3. I2C Signal Connections
Module Pin Name Type Termination Description
I2C0_SCL/SDA
I/OD
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson
TX2 NX
I2C #0 Clock and Data. Connect to CLK and Data pins of any 3.3V
devices
I2C1_SCL/SDA
I/OD
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson
TX2 NX
I2C #1 Clock and Data. Connect to CLK and Data pins of 3.3V
devices.
I2C2_SCL/SDA
I/OD
2.2kΩ pull-ups to
VDD_1V8
on Jetson TX2
NX
I2C #2 Clock and Data. Connect to CLK and Data pins of any 1.8V
devices
CAM_I2C_SCL/SDA
I/OD
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson
TX2 NX
Camera I2C Clock and Data. Connect to CLK and Data pins of any
3.3V devices
Notes:
1. If some devices require a different voltage level than others connected to the same I2C bus, level shifters are required.
2. For I2C interfaces that are pulled up to 1.8V, disable the E_IO_HV option for these pads. For I2C interfaces that are pulled up
to 3.3V, enable the E_IO_HV option. The E_IO_HV option is selected in the Pinmux registers.

Nvidia Jetson TX2 NX Specifications

General

Brand	Nvidia
Model	Jetson TX2 NX
Category	Computer Hardware
Language	English