MC68HC705P9 Datasheet, PDF (95/160 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC705P9
Section 8. Computer Operating Properly Watchdog (COP)
8.1 Contents
8.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8.4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8.4.1 COP Watchdog Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8.4.2 COP Watchdog Timeout Period . . . . . . . . . . . . . . . . . . . . . . 96
8.4.3 Clearing the COP Watchdog . . . . . . . . . . . . . . . . . . . . . . . .97
8.5 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8.6 COP Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
8.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8.7.1 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
8.7.2 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
8.2 Features
Features include:
• Protection from runaway software
• 65.5-ms timeout period (with 2-MHz bus frequency)
• Wait mode operation
MC68HC705P9 — Rev. 4.0
MOTOROLA
Computer Operating Properly Watchdog (COP)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
95