Miscellaneous Interfaces
NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 69
Table 12-2. I2C Interface Signal Routing Requirements
Max frequency: Standard-mode / Fm / Fm+
Single ended, bi-directional, multiple initiators/targets
Max loading: Standard-mode / Fm / Fm+
Standard Mode
3400 (~20)
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 12-3. I2C Signal Connections
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson Xavier
I2C #0 Clock and Data. Connect to CLK and Data pins of any 3.3V
devices
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson Xavier
I2C #1 Clock and Data. Connect to CLK and Data pins of 3.3V
devices.
2.2kΩ pull-ups to VDD_1V8 on
Jetson Xavier NX
I2C #2 Clock and Data. Connect to CLK and Data pins of any 1.8V
devices
2.2kΩ pull-ups to
VDD_3V3_SYS
on Jetson Xavier
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.
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