I2C Design Guidelines; Figure 12-1. I2C Connections - Nvidia Jetson Xavier NX Design Manual

Figure 12-1. I2C Connections

SoC – I2C
SYS
PWR_I2C_SCL
PWR_I2C_SDA
CAM
CAM_I2C_SCL
CAM_I2C_SDA
CONN
GEN1_I2C_SCL
GEN1_I2C_SDA
EDP
DP_AUX_CH3_P
DP_AUX_CH3_N
AO
GEN2_I2C_SCL
GEN2_I2C_SDA
GEN8_I2C_SCL
GEN8_I2C_SDA
12.1.1

I2C Design Guidelines

Care must be taken to ensure I2C peripherals on same I2C bus connected to Jetson Xavier NX
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.
Notes:
1. The Jetson Xavier NX I2C interfaces have 2.2 kΩ 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.
2. IF I2C interfaces are routed to M.2 Key E or Key M connectors, it is recommended that 0Ω
series be included to allow these to be disconnected. Some M.2 Key E and Key M cards can
cause conflicts with other devices connected to the I2C interfaces.
NVIDIA Jetson Xavier NX
Jetson
VDD_1V8
On-Module
Usage Only
2.2kΩ
VDD_3V3_SYS
2.2kΩ
CAM_I2C_SCL
CAM_I2C_SDA
2.2kΩ
VDD_1V8
2.2kΩ
I2C2_SCL
I2C2_SDA
2.2kΩ
VDD_3V3_SYS
2.2kΩ
I2C1_SCL
I2C1_SDA
2.2kΩ
VDD_3V3_SYS
2.2kΩ
I2C0_SCL
I2C0_SDA
VDD_3V3_SYS
On-Module
Power Monitor
Used as camera module control interface
213
or available for misc. 3.3V I2C devices.
215
232
Available for misc. 1.8V I2C devices
234
189
Available for misc. 3.3V I2C devices
191
185
Available for misc. 3.3V I2C devices
187
Miscellaneous Interfaces
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