Motorola MCF5281 ユーザーズマニュアル
MOTOROLA
Chapter 14. Signal Descriptions
14-1
Chapter 14
Signal Descriptions
This chapter describes MCF5282 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.
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.
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.
an overbar.
14.1 Overview
Figure 14-1 shows the block diagram of the MCF5282 with the signal interface.