Micrel KSZ8091RNA-EVAL User Manual
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Micrel KSZ8091RNA-EVAL User Manual

10base-t/100base-tx physical layer transceiver evaluation board
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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.
Micrel, Inc.  2180 Fortune Drive  San Jose, CA 95131  U.S.A.
408-944-0800 (voice)  408-474-1000 (fax)
http://www.Micrel.com

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Summary of Contents for Micrel KSZ8091RNA-EVAL

  • Page 1 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.
  • Page 2 KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide Revision History Revision Date Summary of Changes 8/17/12 Initial Release Micrel, Inc. August 17, 2012 Rev. 1.0 2/11...

  • Page 3: Table Of Contents

    USB Interface ..................... 9     Power ........................9     RMII Loopback Jumpers ..................10     Test Point Definition ..................... 11     RJ-45 Connector ....................11     LED Indicators ...................... 11 Micrel, Inc. August 17, 2012 Rev. 1.0 3/11...
  • Page 4 KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide List of Figures   Figure 1. KSZ8091RNA / KSZ8091RND Evaluation Board ............6   Figure 2. KSZ8091RNA-EVAL interfacing with KSZ8463RLI Evaluation Board ......7 List of Tables   Table 1. Board Configuration for RMII Clocking Modes ..............8  ...

  • Page 5: Introduction

    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) ...

  • Page 6: Hardware Description

    KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide Hardware Description The KSZ8091RNA-EVAL / KSZ8091RND-EVAL (shown in Figure 1) come in a compact form factor and plugs directly into other boards with Ethernet MACs that expose the RMII interface through an MII connector. Configuration of the KSZ8091RNA / KSZ8091RND is accomplished through on-board jumper selections and/or by PHY register access via the MDC/MDIO management pins at the MII connector.

  • Page 7: Rmii (Reduced Media Independent Interface)

    KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide 4.1 RMII (Reduced Media Independent Interface) The KSZ8091RNA-EVAL / KSZ8091RND-EVAL accesses RMII data from the MII connector J4. This connector is also optionally used for MDC/MDIO management bus access and for 5V power to the evaluation board.

  • Page 8: Table 1. Board Configuration For Rmii Clocking Modes

    R11, C16, C17, Y1 Table 1. Board Configuration for RMII Clocking Modes The KSZ8091RNA-EVAL / KSZ8091RND-EVAL have provision for an oscillator in position Y2. This oscillator is normally not used, and is therefore not populated. If desired, a 25MHz oscillator (and appropriate resistor installation) may be used in place of oscillator Y1 for 25MHz Mode.

  • Page 9: Mdc/Mdio Management Interface

    Table 3. MIIM Source Selection To access the MIIM through USB, install MicrelSwitchPhyTools on a Windows PC. This software includes two useful utilities for USB connections to Micrel Ethernet devices. For MIIM access, use the MicrelMDIOConfigApp.exe application that is included in the MicrelSwitchPhyTools installation..

  • Page 10: Rmii Loopback Jumpers

    Table 5. VDDIO Voltage Selection 4.4 RMII Loopback Jumpers The KSZ8091RNA-EVAL / KSZ8091RND-EVAL have a set of jumpers that may be used to loopback the RMII interface. To loopback, all three jumpers must be installed. The individual jumpers are defined in Table 6.

  • Page 11: Test Point Definition

    KSZ8091RNA / KSZ8091RND 10Base-T/100Base-TX Evaluation Board User’s Guide 4.5 Test Point Definition The KSZ8091RNA-EVAL / KSZ8091RND-EVAL have several test points. They are defined in the following table. Test Point Definition SYS_CLK_BTB (50MHz Mode RMII clock, requires installation of R21) TP2, TP8, TP9, TP10, TP11...

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