MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 399

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 10
Programmable Interrupt Controller
This chapter describes the programmable interrupt controller (PIC) interrupt protocol, various types of
interrupt sources controlled by the PIC unit, and the PIC registers with some programming guidelines.
10.1
Introduction
The PIC prioritizes and manages interrupts directed to the int signal. It also manages the interrupts
generated by the PIC itself and by off-chip interrupt sources.
The PIC receives interrupt signals from three sources: external to the integrated device, internal to the
integrated device, and intrinsic to the PIC itself. The PIC selects among all current interrupts the one with
the highest priority and forwards it to the internal processor core, or, in pass-through mode, off-chip for
external servicing.
10.1.1
Overview
The PIC is compliant with the OpenPIC architecture. The interrupt controller provides interrupt
management, and is responsible for receiving hardware-generated interrupts from different sources (both
internal and external), prioritizing them, and delivering them to the CPU for servicing.
A high level block diagram of the peripheral interrupt controller (PIC) showing the interfaces is shown in
Figure 10-1.
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Freescale Semiconductor
10-1