M68HC08 datasheet(63/288 Pages) FREESCALE

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MC68HC908BD48 — Rev. 2.1

Data Sheet

Freescale Semiconductor

Configuration Register (CONFIG)

Data Sheet — MC68HC908BD48

Section 5. Configuration Register (CONFIG)

5.1 Contents

5.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.3

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.3.1

Configuration Register 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

5.3.2

Configuration Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.2 Introduction

This section describes the configuration registers, CONFIG0 and

CONFIG1. The configuration registers enable or disable these options:

•

Sync Processor HSYNCO output pin

•

Sync Processor VSYNCO output pin

•

Sync Processor SOG input pin

•

Stop mode recovery time (32 OSCXCLK cycles or 4096

OSCXCLK cycles)

•

COP timeout period (218 – 24 or 213 – 24 OSCXCLK cycles)

•

STOP instruction

•

Computer operating properly module (COP)

5.3 Functional Description

The configuration registers are used in the initialization of various

options. The configuration registers can be written once after each reset.

All of the configuration register bits are cleared during reset. Since the

various options affect the operation of the MCU, it is recommended that

these registers be written immediately after reset. The configuration

M68HC08 Datasheet(PDF) 63 Page - Freescale Semiconductor, Inc