I have i2c0 problem with Jetson Nano SOM.
I have made my own carrier board and have exposed i2c0 to to the connector for connecting some peripheral, in particular case the TCA6424A. I worked few weeks and everything was completely fine. I have measured 3.3V good shaped SCL and SDA. i2cdetect -y -r 0 worked also fine. Suddenly i2c0 became unresponsive, nothing, both SDA and SCL are just few mV above zero if a make a oscilloscope measurements (once again it was toggled during the boot before problem accrued). The really bad thing that “I killed” already three Jetson Nano(two from eval kit and one production), but the most important I cannot understand what is wrong…The only thing that I think was able to cause the Jetson i2c0 fail is that I connected my external PCB with TCA6424A while carrier board was under power(hot connection) in such case was it passable that the damage is by ESD…I was not implemented ESD protection on i2c0…but three boards, both sda, scl…seems to me very weak idea.
Please help me to understand what could be wrong.
The partial output as a respond to i2cdetect -y -r 0 is below.
Thanks for your help!