Interrupt Pin (IRQ) not working

[MohsinEngineer]

I am facing problems using sc16is750 breakout board. I want to use the interrupt method mentioned in the datasheet. According to which, the IRQ pin should be active low whenever Rx or Tx pins are active, and an Interrupt should be generated.

But the IRQ pin remains high nonetheless. I have set up an external 1k ohm pull-up resistor as mentioned with 3.3v VDD.

Can someone help me out?

[nopnop2002]

There is a bug at the PCB routing:
On all boards, the wire between the SC16IS750 IRQ pin and the board's IRQ connector is missing.
Therefore, interrupt notification by IRQ does not work.

It's not a library issue.

      Breakout
      +--------------------------
      |
      |       +---------------+
      |       |SC16IS750      |
      |       |               |
      |       |               |
      |       |               |
      |       |               |
      |       |               |
      |       |               |
      |       |               |
     IRQ  +--IRQ              |
      |   |   |               |
      |   |   |               |
      |   |   |               |
      |   |   +---------------+
      |   |
      |   +--1Kohm--N/C
      |
      +--------------------------