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MiniZed PL LED Constraints

armaank

I am having trouble connecting external I/O components to the ARJ2 connector. I want to use the AD3, AD4, and AD5 pins which respectively translate to E13, E12, and E11 Zynq package pins. However, I am aware that these pins are used for the PL LEDs and PL switch. I am not sure how to disable the PL I/O so that when I send a signal to these 3 pins, it goes to my externally connected I/O rather than the PL I/O. I am programming the MiniZed using Verilog in Vivado 2020.1.1. Any help would be greatly appreciated!

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    AD3, AD4 and AD5 are indeed used by some user I/O, but they can be re-purposed.  If you have slower I/O that are not really affected by having the LED driver inputs connected, you could still use them.  The switch is of course more complicated.
    But if you look at the schematic, you will notice that the switch can be disconnected by removing R5.  Alternatively, all 3 signals can be disconnected by cutting through the traces in the middle of NTR10, NTR11 and NTR12.  These links have been placed on the PCB for this purpose.  If, after you have cut one of these, you decide to restore the original PCB connection again, you can solder-link or use a 0R resistor there.

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    AD3, AD4 and AD5 are indeed used by some user I/O, but they can be re-purposed.  If you have slower I/O that are not really affected by having the LED driver inputs connected, you could still use them.  The switch is of course more complicated.
    But if you look at the schematic, you will notice that the switch can be disconnected by removing R5.  Alternatively, all 3 signals can be disconnected by cutting through the traces in the middle of NTR10, NTR11 and NTR12.  These links have been placed on the PCB for this purpose.  If, after you have cut one of these, you decide to restore the original PCB connection again, you can solder-link or use a 0R resistor there.

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