| Signal Name | Direction | Description |
|---|---|---|
| usr_irq_req[NUM_USR_IRQ-1:0] | I | Assert to generate an interrupt. Maintain assertion until interrupt is serviced. |
| usr_irq_ack[NUM_USR_IRQ-1:0] | O | Indicates that the interrupt has been sent on PCIe. Two acks are generated for legacy interrupts. One ack is generated for MSI interrupts. |
Each bits in usr_irq_req bus corresponds to
the same bits in usr_irq_ack. For example, usr_irq_ack[0] represents an ack for usr_irq_req[0].