Intel E3815 FH8065301567411 Data Sheet

Intel

®

 Atom™ Processor E3800 Product Family

5290

Datasheet

The SoC provides an ISA-compatible programmable interrupt controller (PIC) that 
incorporates the functionality of two, cascaded 8259 interrupt controllers.

In addition to providing support for ISA compatible interrupts, this interrupt controller 
can also support PCI based interrupts (PIRQs) by mapping the PCI interrupt onto a 
compatible ISA interrupt line. Each 8259 controller supports eight interrupts, numbered 
0–7. 

 shows how the controllers are connected.

The SoC does not implement any external PIRQ# signals. The PIRQs referred to in this 
chapter originate from the interrupt routing unit.

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Platform Control Unit

UAR

T

LPC

GP
IO

RT
C

HPET

82
59

AP
IC

82
54

SMB

iLB

SP
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PMC