MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 295

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

14.1 Contents
14.2 Introduction
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Advance Information — MMC2114, MMC2113, and MMC2112
14.2
14.3
14.3.1
14.3.2
14.3.3
14.3.4
14.4
14.5
14.6
14.6.1
14.6.2
14.6.2.1
14.6.2.2
14.6.2.3
14.6.2.4
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.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Memory Map and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Doze Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Debug Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Section 14. Watchdog Timer Module
Watchdog Control Register . . . . . . . . . . . . . . . . . . . . . . 299
Watchdog Modulus Register . . . . . . . . . . . . . . . . . . . . . 301
Watchdog Count Register . . . . . . . . . . . . . . . . . . . . . . .302
Watchdog Service Register . . . . . . . . . . . . . . . . . . . . . . 303
Go to: www.freescale.com
Watchdog Timer Module
Advance Information
295