Miscellaneous Interfaces
PRELIMINARY INFORMATION
NVIDIA Jetson Orin NX DG-10931-001_v0.1 | 63
Table 12-3. I2C Signal Connections
1.5kΩ pull-ups to VDD_3V3 on
the module.
I2C #0 Clock and Data. Connect to CLK and Data pins of any
3.3V devices
1.5kΩ pull-ups to VDD_3V3 on
the module.
I2C #1 Clock and Data. Connect to CLK and Data pins of 3.3V
devices.
1.5kΩ pull-ups to VDD_1V8 on
the module.
I2C #2 Clock and Data. Connect to CLK and Data pins of any
1.8V devices
1.5kΩ pull-ups to VDD_3V3 on
the module.
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 RCV_33_18_SEL option for these pads. For I2C interfaces that are pulled
up to 3.3V, enable the RCV_33_18_SEL option. The RCV_33_18_SEL option is selected in the Pinmux registers.
12.2 SPI
The Jetson Orin NX brings out two of the Orin SPI interfaces. See Figure 12-2.
Table 12-4. Jetson Orin NX SPI Pin Descriptions
Pin #
Module Pin
Name Orin Signal Usage and Description
Recommended
Usage Direction Pin Type
91 SPI0_SCK GP47_SPI1_SCK SPI 0 Clock
SPI #0 Device #0
or #1
Bidir
CMOS –
1.8V
93 SPI0_MISO GP48_SPI1_MISO SPI 0 Initiator In / Target Out
89 SPI0_MOSI GP49_SPI1_MOSI SPI 0 Initiator Out / Target In
95 SPI0_CS0* GP50_SPI1_CS0 SPI 0 Chip Select 0 SPI #0 Device #0
97 SPI0_CS1* GP51_SPI1_CS1 SPI 0 Chip Select 1 SPI #0 Device #1
106 SPI1_SCK GP36_SPI3_SCK SPI 1 Clock
SPI #1 Device #0
or #1
108 SPI1_MISO GP37_SPI3_MISO SPI 1 Initiator In / Target Out
104 SPI1_MOSI GP38_SPI3_MOSI SPI 1 Initiator Out / Target In
110 SPI1_CS0* GP39_SPI3_CS0 SPI 1 Chip Select 0 SPI #1 Device #0
112 SPI1_CS1* GP40_SPI3_CS1 SPI 1 Chip Select 1 SPI #1 Device #1
Notes: In the Direction column, Output is from Jetson Orin NX. Input is to Jetson Orin NX. Bidir is for Bidirectional signals.
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