Intel® Quartus® Prime Pro Edition User Guide: Platform Designer

ID 683609
Date 4/03/2023
Public

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6.4.1. Individual Requests IRQ Scheme

In the individual requests IRQ scheme, Platform Designer interconnect passes IRQs directly from the sender to the receiver, without making assumptions about IRQ priority. If multiple senders assert their IRQs simultaneously, the receiver logic determines which IRQ has highest priority, and then responds appropriately.
Interrupt Controller Mapping IRQs

Using individual requests, the interrupt controller can process up to 2048 IRQ inputs. The interrupt controller generates a 2048‑bit signal irq[2047:0] to the receiver, and maps agent IRQ signals to the bits of irq[2047:0]. Any unassigned bits of irq[2047:0] are disabled.