mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 415

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mc68hc908lj24

Manufacturer Part Number
mc68hc908lj24
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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21.1 Contents
21.2 Introduction
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Data Sheet — MC68HC908LJ24
Section 21. Computer Operating Properly (COP)
21.2
21.3
21.4
21.4.1
21.4.2
21.4.3
21.4.4
21.4.5
21.4.6
21.4.7
21.4.8
21.5
21.6
21.7
21.8
21.8.1
21.8.2
21.9
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 configuration register 1 (CONFIG1).
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .419
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .416
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .419
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 420
Computer Operating Properly (COP)
ICLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .417
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 418
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .420
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .420
Data Sheet
415

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