NXP Semiconductors MPC5566 - Introduction

MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 6-1
Chapter 6
System Integration Unit (SIU)
6.1 Introduction
This chapter describes the device system integration unit (SIU) that configures and initializes the following
controls:
• MCU reset configuration
• System reset operation
• Pad configuration
• External interrupts
• General-purpose I/O (GPIO)
• Internal peripheral multiplexing
6.1.1 Block Diagram
Figure 6-1 is a block diagram of the SIU. One signal, from the muxed signals shown on the right side of
the diagram, is assigned to a ball on the device. The SIU registers are accessed using the crossbar switch.