mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 297
mc68hc908jb16
Manufacturer Part Number
mc68hc908jb16
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908JB16.pdf
(332 pages)
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17.1 Contents
17.2 Introduction
MC68HC908JB16
Freescale Semiconductor
Technical Data — MC68HC908JB16
Section 17. Computer Operating Properly (COP)
—
Rev. 1.1
17.2
17.3
17.4
17.4.1
17.4.2
17.4.3
17.4.4
17.4.5
17.4.6
17.4.7
17.4.8
17.5
17.6
17.7
17.8
17.8.1
17.8.2
17.9
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 CONFIG register.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 302
Computer Operating Properly (COP)
OSCDCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 300
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302
Technical Data
297
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