We have designed a PCB with IMX6UL(MCIMX6G2CVM05AA) and PF3001. We normally update the binary in Uboot through the debug UART(UART1) port provided on the PCB.A FTDI 'UART to USB translator' is used for interface from our device to PC.
We observe that on usage over a course of time,the UART RX line of processor is shorted to ground.We physically checked for the short on the PCB.But there was no physical shorts.
As the UART RX was initially working fine and developed short over time, can you please let us know what can be source of this.Is there any suggestions need to be followed for prevention of this.
Please find the attached part of schematic regarding debugging UART section.
Your suggestions are highly appreciated.