Freescale-semiconductor MPC8260 Uživatelský manuál stáhnout pdf (Strana 104)

Overview

MPC8260 PowerQUICC II Family Reference Manual, Rev. 2

1-10 Freescale Semiconductor

PowerQUICC II initialization code requires changes from the MPC860 initialization code (Freescale

provides reference code).

1.3.1 Signals

Figure 1-2 shows PowerQUICC II signals grouped by function. Note that many of these signals are

multiplexed and this figure does not indicate how these signals are multiplexed.

NOTE

A bar over a signal name indicates that the signal is active low—for

example, BB (bus busy). Active-low signals are referred to as asserted

(active) when they are low and negated when they are high. Signals that are

not active low, such as TSIZ[0–3] (transfer size signals) are referred to as

asserted when they are high and negated when they are low.

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Freescale-semiconductor MPC8260 Uživatelský manuál Strana 104