MCF5271 datasheet(4/40 Pages) FREESCALE

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MCF5271 Integrated Microprocessor Hardware Specification, Rev. 2

Features

Freescale Semiconductor

4

3Features

For a detailed feature list see the MCF5271 Reference Manual (MCF5271RM).

4

Signal Descriptions

This section describes signals that connect off chip, including a table of signal properties. For a more

detailed discussion of the MCF5271 signals, consult the MCF5271 Reference Manual (MCF5271RM).

4.1

Signal Properties

Table 2 lists all of the signals grouped by function. The “Dir” column is the direction for the primary

function of the pin. Refer to Section 6, “Mechanicals/Pinouts and Part Numbers,” for package diagrams.

NOTE

In this table and throughout this document a single signal within a group is

designated without square brackets (i.e., A24), while designations for

multiple signals within a group use brackets (i.e., A[23:21]) and is meant to

include all signals within the two bracketed numbers when these numbers

are separated by a colon.

NOTE

The primary functionality of a pin is not necessarily its default functionality.

Pins that are muxed with GPIO will default to their GPIO functionality.

Table 2. MCF5270 and MCF5271 Signal Information and Muxing

Signal Name

GPIO

Alternate 1 Alternate 2

Dir.1

MCF5270

MCF5271

160 QFP

MCF5270

MCF5271

196 MAPBGA

Reset

RESET

—

I

83

N13

RSTOUT

—

O

82

P13

Clock

EXTAL

—

I

86

M14

XTAL

—

O

85

N14

CLKOUT

—

O

89

K14

Mode Selection

CLKMOD[1:0]

—

I

20,21

G5,H5

RCON

—

I

79

K10

External Memory Interface and Ports

A[23:21]

PADDR[7:5]

CS[6:4]

—

O

126, 125, 124

B11, C11, D11

Số phần tương tự - MCF5271

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