MCF5282CVM66 Freescale, MCF5282CVM66 Datasheet - Page 355
MCF5282CVM66
Manufacturer Part Number
MCF5282CVM66
Description
Manufacturer
Freescale
Datasheet
1.MCF5282CVM66.pdf
(766 pages)
Specifications of MCF5282CVM66
Cpu Family
MCF528x
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Interface Type
CAN/I2C/QSPI/UART
Total Internal Ram Size
64KB
# I/os (max)
150
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
3.3V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
256
Package Type
MA-BGA
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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Chapter 18
Watchdog Timer Module
18.1
The watchdog timer is a 16-bit timer used to help software recover from runaway code. The watchdog
timer has a free-running down-counter (watchdog counter) that generates a reset on underflow. To prevent
a reset, software must periodically restart the countdown by servicing the watchdog.
18.2
This subsection describes the operation of the watchdog module in low-power modes and halted mode of
operation. Low-power modes are described in
watchdog module operation in the low-power modes, and shows how this module may facilitate exit from
each mode.
In wait mode with the watchdog control register’s WAIT bit (WCR[WAIT]) set, watchdog timer operation
stops. In wait mode with the WCR[WAIT] bit cleared, the watchdog timer continues to operate normally.
In doze mode with the WCR[DOZE] bit set, the watchdog timer module operation stops. In doze mode
with the WCR[DOZE] bit cleared, the watchdog timer continues to operate normally. Watchdog timer
operation stops in stop mode. When stop mode is exited, the watchdog timer continues to operate in its
pre-stop mode state.
In halted mode with the WCR[HALTED] bit set, watchdog timer module operation stops. In halted mode
with the WCR[HALTED] bit cleared, the watchdog timer continues to operate normally. When halted
mode is exited, watchdog timer operation continues from the state it was in before entering halted mode,
but any updates made in halted mode remain.
Freescale Semiconductor
Low-power Mode
Introduction
Low-Power Mode Operation
Halted
Doze
Wait
Stop
Table 18-1. Watchdog Module Operation in Low-power Modes
Normal if WCR[HALTED] cleared,
Normal if WCR[DOZE] cleared,
Normal if WCR[WAIT] cleared,
Watchdog Operation
stopped otherwise
stopped otherwise
stopped otherwise
Stopped
Chapter 7, “Power
Upon Watchdog reset
Upon Watchdog reset
No
Upon Watchdog reset
Management.” Table 3-1 shows the
Mode Exit
18-1
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