Motorola ColdFire MCF5281 - Manual (Page 241)

Freescale Semiconductor 14-1
Chapter 14
Signal Descriptions
This chapter describes the processor’s external signals. It 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.
Chapter 13, “External Interface Module (EIM) ,” describes how these signals
interact.
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.
14.1 Overview
Figure 14-1 shows the block diagram with the signal interface.
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3