Now, we have a issue in the product using i.MX6SX.
I searched it in this community, and I found any same issues as follows:
It is an issue to continue receiving 0xFF as well as these reports, although there is no data reception.
As shown in the following figure, general UART communication has Start bit and Stop bit.
When receiving continuous data, can't the UART block for i.MX detect Start-bit and Stop-bit?