What's the voltage of SPI pins and I2C pins in J41 of Jetson Nano dev kit ?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
#1

Hello all,

We want to update the MCU FW and do something else from jetson Nano dev kit side through SPI and I2C, cause the working voltage of MCU is 1.8V, but we are not sure about the voltage of SPI pins and I2C pins in J41 on Nano dev kit. So what’s the voltage of those interfaces?

Thanks in advance.

#2

There’s a level shifter for those pins to make them 3.3v.

#3

Agreed. From the Jetson Nano Developer Kit User Guide, page 7-8

Interface Details
…
Carrier Board
…

  • [J41] 40-pin expansion header includes:
      • ...
    • Interface signal pins.

      • All signals use 3.3V levels.
      …