MPC821 datasheet(185/242 Pages) NXP

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OPERATING INSTRUCTIONS

MOTOROLA

MPC860TFADS Daughter Board Design Specification—Rev 0.1

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

3 - OPERATING INSTRUCTIONS

3•1

INTRODUCTION

This chapter provides necessary information to use the MPC860TFADSDB

3•2

CONTROLS AND INDICATORS

The MPC860TFADSDB has in addition to the switches a few indicators - described below:.

3•2•1

GND Bridges

There are 4 GND bridges on the MPC860TFADSDB. They are meant to assist general measure-

ments and logic-analyzer connection.

Warning

The GND bridges on board, physically resemble J4.

Do not mistake J4 to be a GND jumper, otherwise,

permanent damage might be inflicted to the

MPC860TFADSDB and or to the MPC8XXFADS.

Warning

When connecting to a GND bridge, use only INSU-

LATED GND clips. Failure in doing so, might result

in permanent damage to the MPC860TFADSDB.

3•2•2

3.3V Indicator - LD1

The yellow 3.3V led LD1 indicates that the 3.3V power bus is powered from the MPC8XXFADS.

3•2•3

Receive Led - LD2

When the yellow LD4 is light, the fast ethernet receive is in process, for 10M or for 100M.

3•2•4

Transmit Led - LD3

When the yellow LD5 is light, the fast ethernet transmit is in process, for 10M or for 100M.

3•2•5

Link Led - LD4

When the yellow LD6 is light, during the 100Mbps operation indicates scrambler lock and receipt of

valid idle codes. During 10Mbps operation, indicates link valid status.

3•2•6

Collision Led - LD5

When the yellow LD7 is light, in the default mode it indicates a collision. However this led is a

programmable led and it can indicate other definitions. For a programing options see configuration

3•2•7

Speed Led- LD6

When the Speed Led is light it indicates that the LXT970 operate in 100Mbps. When this led is off and

the led on indication is on so the ethernet speed is 10M. Note the 10M ethernet means 10M operating

through the MII bus.

3•2•8

Fast - Ethernet - On Indicator - LD7

When the yellow Fast - Ethernet-ON indicator led LD2 is lit, it designates that the LXT970 transceiver

is enabled for the Fast - Ethernet operation. When it is darkened, the LXT970 is tri-stated and the MII

pins output from the LXT970 are in three-state. these pins with the input to the LXT970 pins may be

used for any alternate function. See also TABLE 4-23. "BCSR4 Description" on page 57 of the

MPC8XXFADS User’s Manual.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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