MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 173

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MC68HC908JK3

Manufacturer Part Number
MC68HC908JK3
Description
MC68HC908JK1
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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15.1 Contents
15.2 Introduction
MC68H(R)C908JL3
MOTOROLA
Technical Data — MC68H(R)C908JL3
Section 15. Computer Operating Properly (COP)
Rev. 1.0
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 CONFIG1 register.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 178
Computer Operating Properly (COP)
2OSCOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 176
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Technical Data
173

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