mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 297

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mc68hc908jb16

Manufacturer Part Number
mc68hc908jb16
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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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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