Pin Assignments and Reset States

Freescale Semiconductor

6

high current in the internal ESD protection diodes. The rise times on the power supplies should be slower than 500 us to avoid

turning on the internal ESD protection clamp diodes.

3.3.2

Power Down Sequence

ESD protection diodes. There are no requirements for the fall times of the power supplies.

The recommended power down sequence is as follows:

1.

2.

4

Pin Assignments and Reset States

4.1

Signal Multiplexing

The following table lists all the MCF537x pins grouped by function. The Dir column is the direction for the primary function

of the pin only. Refer to Section 7, “Package Information,” for package diagrams. For a more detailed discussion of the

MCF537x signals, consult the MCF5373 Reference Manual (MCF5373RM).

NOTE

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

without square brackets (i.e., A23), 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 default to their GPIO functionality.

Table 3. MCF5372/3 Signal Information and Muxing

Signal Name

GPIO

Alternate 1

Alternate 2

MCF5372

MCF5373

160 QFP

MCF5372L

MCF53721

MCF5373L

196 MAPBGA

Reset

—

—

—

I

EVDD

95

K13

RSTOUT

—

—

—

O

EVDD

86

L12

Clock

EXTAL

—

—

—

I

EVDD

91

L14

—

—

—

O

EVDD

93

K14

EXTAL32K

—

—

—

I

EVDD

—

P13

XTAL32K

—

—

—

O

EVDD

—

N13

FB_CLK

—

—

—

O

SDVDD

40

N1