Quartus® Prime Pro Edition User Guide: Platform Designer

ID 683609
Date 9/30/2024
Public
Document Table of Contents

5.4. Interrupt Interfaces

Using individual requests, the interrupt logic can process up to 2048 IRQ inputs connected to each interrupt receiver. With this logic, the interrupt sender connected to interrupt receiver0 is the highest priority with sequential receivers being successively lower priority. You can redefine the priority of interrupt senders by instantiating the IRQ mapper component. For more information, refer to IRQ Mapper.

You can define the interrupt sender interface as asynchronous with no associated clock or reset interfaces. You can also define the interrupt receiver interface as asynchronous with no associated clock or reset interfaces. As a result, the receiver does its own synchronization internally. Platform Designer does not insert interrupt synchronizers for such receivers.

For clock crossing adaptation on interrupts, Platform Designer inserts a synchronizer. This synchronizer is clocked with the interrupt end point interface clock when the corresponding starting point interrupt interface has no clock or a different clock (than the end point). Platform Designer inserts the adapter if there is any kind of mismatch between the start and end points. Platform Designer does not insert the adapter if the interrupt receiver does not have an associated clock.