MC68HC908JK3EMP MOTOROLA [Motorola, Inc], MC68HC908JK3EMP Datasheet - Page 179
MC68HC908JK3EMP
Manufacturer Part Number
MC68HC908JK3EMP
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JK3EMP.pdf
(226 pages)
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15.1 Contents
15.2 Introduction
MC68H(R)C908JL3E/JK3E/JK1E
MOTOROLA
Technical Data – MC68H(R)C908JL3E/JK3E/JK1E
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 CONFIG1 register.
—
Rev. 2.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . .184
Computer Operating Properly (COP)
2OSCOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 182
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Technical Data
179
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