Freescale-semiconductor ColdFire MCF52210 Manual de usuario descargar pdf (Pagina 31)

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Signal Descriptions

MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2

Freescale Semiconductor 2-1

Chapter 2

Signal Descriptions

2.1 Introduction

This chapter describes signals implemented on this device and includes an alphabetical listing of signals

that characterizes each signal as an input or output, defines its state at reset, and identifies whether a

pull-up resistor should be used.

NOTE

The terms assertion and negation are used to avoid confusion when dealing

with a mixture of active-low and active-high signals. The term asserted

indicates that a signal is active, independent of the voltage level. The term

negated indicates that a signal is inactive.

Active-low signals, such as SRAS and TA, are indicated with an overbar.

2.2 Overview

Figure 2-1 shows the block diagram of the device with the signal interface.

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