Programmable interrupt controller: Difference between revisions

Revision as of 08:37, 11 March 2022

Revision as of 22:11, 14 March 2022

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{{distinguish| PIC microcontroller }}

{{Multiple issues|

{{one source|date=February 2014}}

{{more footnotes|date=September 2013}}

}}

In [[computing]], a '''programmable interrupt controller''' ('''PIC''') is an [[integrated circuit]] that helps a [[microprocessor]] (or [[CPU]]) handle [[Interrupt request (PC architecture)|interrupt requests]] (IRQ) coming from multiple different sources (like external I/O devices) which may occur simultaneously.<ref>{{cite journal|title=A Revisitation of Kernel Synchronization Schemes

|authors=Christopher Small and Stephen Manley

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==Well-known types==

One of the best known PICs, the [[Intel 8259|8259A]], was included in the [[x86 architecture|x86]] PC. In modern times, this is not included as a separate chip in an x86 PC, but rather as part of the motherboard's [[Southbridge (computing)|southbridge]] chipset.<ref>https://www.intel.com/Assets/PDF/datasheet/290562.pdf {{Bare URL PDF|date=March 2022}}</ref> In other cases, it has been replaced by the newer [[Advanced Programmable Interrupt Controller]]s which support more interrupt outputs and more flexible priority schemas.

==See also==