MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 189

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MC68HC908QY2

Manufacturer Part Number
MC68HC908QY2
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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15.1 Contents
15.2 Introduction
MOTOROLA
Data Sheet — MC68HC908QY4
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Section 15. Computer Operating Properly (COP)
15.2
15.3
15.4
15.4.1
15.4.2
15.4.3
15.4.4
15.4.5
15.4.6
15.4.7
15.5
15.6
15.7
15.8
15.8.1
15.8.2
15.9
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 the configuration 1 (CONFIG1) register.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 193
Computer Operating Properly (COP)
BUSCLKX4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 192
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
189

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