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Programmable interrupt controller

In computing, a programmable interrupt controller (PIC) is an integrated circuit that helps a microprocessor (or CPU) handle interrupt requests (IRQs) coming from multiple different sources (like external I/O devices) which may occur simultaneously. It helps prioritize IRQs so that the CPU switches execution to the most appropriate interrupt handler…

Well-known types, Common features & Overview

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Well-known types

8259A X86 Advanced Programmable Interrupt Controllers

3 related topics

Common features

End of interrupt Level triggered

2 related topics

Overview

Computing Integrated circuit Microprocessor CPU Interrupt requests

8 related topics

Topics to explore

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Overview

Computing
Integrated circuit
Microprocessor
CPU
Interrupt requests Interrupt request (PC architecture)
Interrupt handler
PC architecture
Southbridge chip Southbridge (computing)

Common features

End of interrupt
Level triggered Interrupt

Well-known types

8259A Intel 8259
X86 X86 architecture
Advanced Programmable Interrupt Controllers Advanced Programmable Interrupt Controller

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Map overview Semantic statistics

Programmable interrupt controller

Nodes17

Edges16

Triples10

Avg. degree1.88

Density0.117647

Components1

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Programmable interrupt controller

Top relations

related to Well-known types · 5

Programmable interrupt controller → Advanced Programmable Interrupt Controllers, In, One, PC, PICs

Important terminology Word statistics

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Important terminology

interrupt pic common isr priority pics priorities cpu register interrupts eoi pc typically helps irqs external southbridge specifies acknowledgement programmable

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
this allows up to two distinct interrupt requests to be outstanding at one time	instance of	A simple register schema	0.80	text
one waiting for acknowledgement	instance of	A simple register schema	0.80	text
and one waiting for EOI.There are a number of common priority schemas in PICs including hard priorities	instance of	A simple register schema	0.80	text
specific priorities	instance of	A simple register schema	0.80	text
and rotating priorities.Interrupts may be either edge triggered or level triggered.There are a number of common ways of acknowledging an interrupt has completed when an EOI is issued	instance of	A simple register schema	0.80	text
Programmable interrupt controller	related to Well-known types	One	0.60	section
Programmable interrupt controller	related to Well-known types	PICs	0.60	section
Programmable interrupt controller	related to Well-known types	PC	0.60	section
Programmable interrupt controller	related to Well-known types	In	0.60	section
Programmable interrupt controller	related to Well-known types	Advanced Programmable Interrupt Controllers	0.60	section

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