600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID 648364
Date 05/10/2022
Document Table of Contents

ISH Interrupt Handling via IOAPIC (Interrupt Controller)

The PCH legacy IOAPIC is the interrupt controller for the ISH. It collects inputs from various internal blocks and sends interrupt messages to the ISH controller. When there is a change on one of its inputs, the IOAPIC sends an interrupt message to the ISH controller.

The PCH IOAPIC allows each interrupt input to be active high or active low and edge or level triggered.