MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 173
MC68HC908JK3
Manufacturer Part Number
MC68HC908JK3
Description
MC68HC908JK1
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JK3.pdf
(210 pages)
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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