MCF5213 ColdFire® Integrated Microcontroller Reference Manual, Rev. 3
Freescale Semiconductor
9-1
Chapter 9
Reset Controller Module
9.1
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.
9.2
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
9.3
Block Diagram
illustrates the reset controller and is explained in the following sections.
