MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
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)
— Phase locked-loop (PLL) loss of lock
— PLL loss of clock
— Software
— Low-voltage detector (LVD)
— JTAG CLAMP, HIGHZ and EXTEST instructions
•
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
illustrates the reset controller and is explained in the following sections.
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
