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Well, as you can see those pins are not connected to anything. Some ZYNQ based FPGA boards have a PMOD or other connector connected to unused PS_MIO pins but your board doesn't.

If you need a second UART you can export the unused PS UART to the PL though the EMIO and either connect the pins to PL logic or PL GPIO. JA or JB seem to be your only options for your board.

 

 

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