Freescale-semiconductor ColdFire MCF52210 Manual de usuario descargar pdf (Pagina 145)

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MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2

Freescale Semiconductor 9-1

Chapter 9

Chip Configuration Module (CCM)

9.1 Introduction

This chapter describes the various operating configurations of the device. It also provides a description of

signals used by the CCM and a programming model.

9.1.1 Features

The chip configuration for the MCF52211 is determined by the chip configuration module (CCM). The

configuration options selectable at reset are:

• Operating Mode

— Serial flash programming mode (EzPort mode)

— Single-chip mode

• Clock Reference

— External oscillator

— External crystal

— On-chip 8 MHz oscillator

• Phase-locked look (PLL)

• BDM or JTAG mode

9.2 External Signal Descriptions

Table 9-1 provides an overview of the CCM signals.

Table 9-1. Signal Properties

Name Function Reset State

The use of external pull-up/down resistors is highly recommended.

RCON

Reset configuration select Internal weak pull-up device

CLKMOD[1:0] Clock mode select

Refer to Chapter 6, “Clock Module” for more information.

—

JTAG_EN JTAG or BDM mode selection Internal weak pull-down device

TEST Test mode selection Internal weak pull-down device

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