MC908QY2CDWE datasheet(57/168 Pages) FREESCALE

No. de pieza	MC908QY2CDWE

Descripción Electrónicos	M68HC08 Microcontrollers

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Fabricante Electrónico	FREESCALE [Freescale Semiconductor, Inc]

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MC68HC908QY/QT Family Data Sheet, Rev. 6

Freescale Semiconductor

57

Chapter 6

Computer Operating Properly (COP)

6.1 Introduction

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 1 (CONFIG1) register.

6.2 Functional Description

Figure 6-1. COP Block Diagram

COPCTL WRITE

BUSCLKX4

RESET CIRCUIT

RESET STATUS REGISTER

INTERNAL RESET SOURCES

12-BIT SIM COUNTER

6-BIT COP COUNTER

COP DISABLE (COPD FROM CONFIG1)

RESET

COPCTL WRITE

CLEAR

COPEN (FROM SIM)

COP COUNTER

COP CLOCK

STOP INSTRUCTION

COP RATE SELECT

(COPRS FROM CONFIG1)

Número de pieza similar - MC908QY2CDWE

Fabricante Electrónico	No. de pieza	Datasheet	Descripción Electrónicos
Freescale Semiconductor...	MC908QY2CDWE	1Mb / 184P	Microcontrollers