Jetson Nano 2GB doesn’t boot up if SDA and SCL connected


I connected a DAC to I2C bus 0 at pins 27 and 28 and now Jetson doesn’t boot up after turning on of power supply
If I disconnect DAC it boots up normally and if after that I connect DAC it works well

hello bvladislav.w,

there’s 2.2kΩ pull-up to 3.3V on the module,
please also check the application note of 40-Pin Expansion Header GPIO Usage Considerations.

Hi, thanks for the response

Where to find this pull-up?
And why it boots up fine if I use IIC bus 1 on 3 and 5 pins without any pull-ups?