s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 353
s908ab32ag0cfue
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s908ab32ag0cfue
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.S908AB32AG0CFUE.pdf
(392 pages)
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20.1 Contents
20.2 Introduction
MC68HC908AB32
Freescale Semiconductor
Technical Data — MC68HC908AB32
Section 20. Computer Operating Properly (COP)
—
Rev. 1.1
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).
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .354
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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
Technical Data
353
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