Miscellaneous Interfaces
NVIDIA Jetson Xavier NX DG-09693-001_v1.7 | 68
Figure 12-1. I2C Connections
Jetson
SoC – I2C
PWR_I2C_SCL
PWR_I2C_SDA
CAM_I2C_SCL
CAM_I2C_SDA
SYS
GEN1_I2C_SCL
GEN1_I2C_SDA
On-Module
Usage Only
VDD_1V8
CAM
CONN
GEN2_I2C_SCL
GEN2_I2C_SDA
AO
GEN8_I2C_SCL
GEN8_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
Used as camera module control interface
or available for misc. 3.3V I2C devices.
CAM_I2C_SCL
CAM_I2C_SDA
I2C2_SCL
I2C2_SDA
I2C1_SCL
I2C1_SDA
I2C0_SCL
I2C0_SDA
Avai lable for misc. 1.8V I2C devices
Avai lable for misc. 3.3V I2C devices
215
213
232
234
185
187
On-Module
Power Mo n it or
DP_AUX_CH3_P
DP_AUX_CH3_N
EDP
VDD_3V3_SYS
2. 2kΩ
2. 2kΩ
Avai lable for misc. 3.3V I2C devices
189
191
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.
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