Micrel KSZ8091RNA-EVAL, Руководство пользователя

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KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide
Micrel, Inc. August 17, 2012
Rev. 1.0
5/11
1.0 Introduction
The KSZ8091RNA / KSZ8091RND is a 10Base-T/100Base-TX Physical Layer Transceiver with
an RMII MAC interface. It utilizes a unique mixed-signal design to extend signaling distance while
reducing power consumption, and offers HP Auto MDI/MDI-X for reliable detection of and
correction for crossover and straight-through cables, eliminating the need to differentiate between
crossover and straight-through cables. It also supports Energy Efficient Ethernet (EEE) and
Wake-on-LAN (WOL).
The difference between the KSZ8091RNA and KSZ8091RND is the default clocking configuration
for the RMII interface. The KSZ8091RNA (by default) outputs a 50 MHz RMII Reference clock,
while the KSZ8091RND (by default) takes the 50 MHz RMII Reference clock as an input.
The KSZ8091RNA / KSZ8091RND comes in a 24-pin, lead-free QFN package and provides an
ideal solution for 10Base-T/100Base-TX applications that have tight PCB board space.
The KSZ8091RNA and KSZ8091RND Eval Boards (KSZ8091RNA-EVAL and KSZ8091RND-
EVAL) provide a convenient platform to evaluate the features of the device. All configuration pins
are accessible either by jumpers, test points or interface connectors.
2.0 Board Features

Micrel KSZ8091RNA or KSZ8091RND 10Base-T/100Base-TX Physical Layer
Transceiver

RJ-45 Jack for Fast Ethernet cable interface

HP Auto MDI/MDI-X for automatic detection and correction for straight-through and
crossover cables

RMII (Reduced Media Independent Interface) using an MII connector to interface with a
MAC controller

2 LED Indicators for status and activity

USB connector for PC access to the MII management bus

Jumpers to configure strapping pins

Manual Reset Button for quick reboot after re-configuration of strapping pins
3.0 Evaluation Kit Contents
The KSZ8091RNA and KSZ8091RND Evaluation Kits include the following hardware:

KSZ8091RNA or KSZ8091RND Evaluation Board
A design package with the following collaterals can be downloaded from Micrel’s website at
http://www.micrel.com

KSZ8091RNA / KSZ8091RND Eval Board Schematic (PDF and OrCAD DSN file)

KSZ80x1 (24-QFN) Eval Board Gerber Files (PDF version included)

KSZ8091RNA / KSZ8091RND Eval Board User’s Guide (this document)

KSZ8091RNA and KSZ8091RND IBIS Models
and the KSZ8091RNA / KSZ8091RND Datasheet which is also available from Micrel’s website.