I’d like to ask about signal UART4_RX (pin L48)
According to Product design guide (page 71, chapter 12.3) : “UART4 pins do not support UART functionality and UART4_RX pin is reserved and must be tied to GND through a 10kΩ resistor”
But in the carrier board reference schematic it’s connected to GND via 0R
We have it actually at the moment floating in our design and it also seems not to cause any problem.
Please what is behind this signal in SoM module? What can happen when we don’t have the recommended 10k (ie. we use 0R or left it floating)?