Freescale Semiconductor ColdFire MCF52210 - Manual (Page 151)

MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 10-1
Chapter 10
Reset Controller Module
10.1 Introduction
The reset controller is provided to determine the cause of reset, assert the appropriate reset signals to the
system, and keep a history of what caused the reset. The low voltage detection module, which generates
low-voltage detect (LVD) interrupts and resets, is implemented within the reset controller module.
10.2 Features
Module features include the following:
• Seven sources of reset:
— External reset input
— Power-on reset (POR)
— Watchdog timer
— Phase locked-loop (PLL) loss of lock
— PLL loss of clock
— Software
— Low-voltage detector (LVD)
• Software-assertable RSTO pin independent of chip reset state
• Software-readable status flags indicating the cause of the last reset
• LVD control and status bits for setup and use of LVD reset or interrupt
10.3 Block Diagram
Figure 10-1 illustrates the reset controller and is explained in the following sections.