MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 171
MC68HC708AS48
Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC708AS48.pdf
(396 pages)
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13.1 Contents
13.2 Introduction
MC68HC708AS48
MOTOROLA
Advance Information — MC68HC708AS48
Section 13. Computer Operating Properly (COP)
—
Rev. 4.0
13.2
13.3
13.4
13.4.1
13.4.2
13.4.3
13.4.4
13.4.5
13.4.6
13.4.7
13.5
13.6
13.7
13.8
13.8.1
13.8.2
13.9
This section describes the computer operating properly (COP) module,
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 periodically clearing the COP counter.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .172
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
COP Module During Break Interrupts . . . . . . . . . . . . . . . . . . .176
Computer Operating Properly (COP)
CGMXCLK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
Internal Reset Resources . . . . . . . . . . . . . . . . . . . . . . . . .174
Reset Vector Fetch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
COPD (COP Disable) . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
COPL (COP Long Timeout) . . . . . . . . . . . . . . . . . . . . . . .175
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Advance Information
171
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