PXS20RM Datasheet, PDF (1359/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Chapter 51
Wakeup Unit (WKPU)
Wakeup Unit (WKPU)
51.1 Introduction
51.1.1 Overview
The WKPU supports one external source that can cause non-maskable interrupt requests or wakeup events.
Figure 51-1 is a block diagram of the WKPU and its interfaces to other system components.
PBRIDGE
Wakeup Unit
NMI / Wakeup
- Configuration
NMI enable
filter bypass
wakeup
0
0
CPU cores
0
0
filter
PADS
IOMUX
IPS
BUS
Mode /
Power Ctl
Figure 51-1. WKPU block diagram
51.1.2 Features
The WKPU supports:
• 1 NMI source
• 1 analog glitch filter
• Independent interrupt destination: non-maskable interrupt, critical interrupt, or machine check
request
• Edge detection
• Cconfigurable system wakeup triggering from a detected NMI event
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
51-1