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Micrel, Inc.  

  2180 Fortune Drive  

  San Jose, CA 95131  

  U.S.A.   

408-944-0800  (voice)  

  408-474-1000  (fax) 

http://www.Micrel.com

 

 

 
 
KSZ8091RNA / KSZ8091RND 

10Base-T/100Base-TX  
Physical Layer Transceiver 
 
Evaluation Board User’s Guide

 

 

 
Revision 1.0  /  August 2012 

 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 

© Micrel, Inc. 2012 

All rights reserved 

 

Micrel is a registered trademark of Micrel and its subsidiaries in the  

United States and certain other countries.  All other trademarks are the 

property of their respective owners. 

 
 

The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is 
assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without 
notification to the customer. Micrel Products are not designed or authorized for use as components in life support 
appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. 
Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) 
support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user.  
A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own 
risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. 

Summary of Contents for KSZ8091RNA-EVAL

Page 1: ...for its use Micrel reserves the right to change circuitry and specifications at any time without notification to the customer Micrel Products are not designed or authorized for use as components in li...

Page 2: ...KSZ8091RNA KSZ8091RND 10Base T 100Base TX Evaluation Board User s Guide Micrel Inc August 17 2012 Rev 1 0 2 11 Revision History Revision Date Summary of Changes 1 0 8 17 12 Initial Release...

Page 3: ...tents 1 0 Introduction 5 2 0 Board Features 5 3 0 Evaluation Kit Contents 5 4 0 Hardware Description 6 4 1 RMII Reduced Media Independent Interface 7 4 2 MDC MDIO Management Interface 9 4 2 1 USB Inte...

Page 4: ...63RLI Evaluation Board 7 List of Tables Table 1 Board Configuration for RMII Clocking Modes 8 Table 2 Connector J4 RMII Pin Definition 8 Table 3 MIIM Source Selection 9 Table 4 5V Power Source Selecti...

Page 5: ...091RND 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 K...

Page 6: ...e MDC MDIO management pins at the MII connector Figure 1 KSZ8091RNA KSZ8091RND Evaluation Board A USB type B connector provides access to the MDC MDIO management interface as an alternative to accessi...

Page 7: ...MHz Mode while the KSZ8091RND powers up in RMII 50MHz mode After power up both KSZ8091RNA and KSZ8091RND can be programmed via PHY register 1Fh bit 7 to either 25MHz mode or 50MHz mode In 25MHz Mode a...

Page 8: ...and appropriate resistor installation may be used in place of an off board RMII reference clock for 50MHz Mode The Eval Board has a 40 pin male edge connector that interfaces with and plugs directly i...

Page 9: ...the board attached to MII connector J4 Also note that the MIIM MDC and MDIO signals of the KSZ8091RNA KSZ8091RND operate at the VDDIO supply voltage which is configurable as 3 3 2 5 1 8 V When MIIM is...

Page 10: ...he KSZ8091RNA KSZ8091RND can be set to one of three different levels The jumper settings for these options are shown in Table 5 KSZ8091 VDDIO Voltage JP2 JP3 3 3V Close 1 2 or 2 3 Close pins 2 3 2 5V...

Page 11: ...SZ8091RND EVAL Test Point Definition 4 6 RJ 45 Connector The RJ 45 Connector J5 connects to standard CAT 5 Ethernet cable to interface with 10Base T 100Base TX Ethernet devices 4 7 LED Indicators An L...

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