MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 353

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MC68HC908AB32

Manufacturer Part Number
MC68HC908AB32
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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20.1 Contents
20.2 Introduction
MC68HC908AB32
MOTOROLA
Technical Data — MC68HC908AB32
Section 20. Computer Operating Properly (COP)
Rev. 1.0
20.2
20.3
20.4
20.4.1
20.4.2
20.4.3
20.4.4
20.4.5
20.4.6
20.4.7
20.4.8
20.5
20.6
20.7
20.8
20.8.1
20.8.2
20.9
The computer operating properly (COP) module contains a free-running
counter that generates a reset if allowed to overflow. The COP module
helps software recover from runaway code. Prevent a COP reset by
clearing the COP counter periodically. The COP module can be disabled
through the COPD bit in configuration register 1 (CONFIG1).
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 358
Computer Operating Properly (COP)
CGMXCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 356
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
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Technical Data
353

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