Hello,
On iMX7DSABRESD board J11 connector is used for Debug UART (via USB).
According to board schematic: Debug UART1 is intended for Cortex-A7;
Debug UART2 for Cortex-M4.
NXP BSP(s) uses such approach, but customers can use any available UART ports
(and pins) for their applications, assuming BSP modification, if needed.
Have a great day,
Yuri
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