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Summary of Contents for National Semiconductor DP83640 Precision PHYTER
- Page 1 10/100 Mb/s Ethernet Products DP83640 Precision PHYTER IEEE 1588 Precision Time Protocol Transceiver Demo Board User Guide Interface Division April 25, 2011 Document Revision C...
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Page 2: Table Of Contents
Table of Contents General Description ........................1 Quick Start ..........................2 Power Connection ...................... 2 2.1.1 MII Interface (Default) ....................2 2.1.2 USB Interface ......................2 2.1.3 External Supply ......................2 Address Setting ......................3 Device Register Access ..................... 4 2.3.1 Access MDIO Through MII .................. -
Page 3: General Description
General Description The purpose of the DP83640 Demo Board is to provide National Semiconductor Corp.'s customers with a vehicle to quickly design and market systems containing the DP83640. Customers are encouraged to copy EVK components to expedite their design process. -
Page 4: Quick Start
DP83640 DEMO BOARD USER GUIDE Quick Start The DP83640 Demo Board is fully assembled and factory tested. Follow the instructions below to set up the hardware platform for the measurement of interest. Power Connection The DP83640 Demo Board provides several options for supplying power to the board. Power can be supplied by way of the MII interface at 3.3 V or 5.0 V, USB interface, or directly from an external supply. -
Page 5: Address Setting
DP83640 DEMO BOARD USER GUIDE Address Setting The PHY address can be set by placing jumpers in J24 and J26 as indicated in Table 1. Placing 2.2k ohm resistors in R47, R49, and R50 will pull PHYAD2, PHYAD3, and PHYAD4 high allowing for PHY addresses greater than 3. -
Page 6: Device Register Access
DP83640 DEMO BOARD USER GUIDE Device Register Access 2.3.1 Access MDIO Through MII To access the device registers through the MII interface jumpers should be placed between pins 1 and 2 of J3 and J4. Figure 3 shows the default jumper settings for the MDIO/MDC access via the MII interface. -
Page 7: Clock Sources
DP83640 DEMO BOARD USER GUIDE Clock Sources The board can be configured to operate with either a crystal or an external oscillator. 2.4.1 Crystal (Default) The board comes with a 25 MHz crystal for use in the MII configuration. A surface mount device using the pads provided on the bottom side of the board can replace the through-hole part. -
Page 8: Straps
DP83640 DEMO BOARD USER GUIDE Straps The DP83640 Demo Board provides a combination of jumpers and resistors to configure the strap options for the device. The following table summarizes the straps and the default settings. Table 2. Strap Settings Jumper Signal Name IC Pin Name... -
Page 9: Leds
DP83640 DEMO BOARD USER GUIDE LEDs Various LEDs are provided to assist the user in determining the state of operation of the board. Table 4 and Table 5 clarify the relationship between the LEDs and Jumpers. Table 4. List of LEDs with Jumpers Associated Jumper Function Revision 1... -
Page 10: Sma Connectors
DP83640 DEMO BOARD USER GUIDE Refer to Table 3 for the “UP” and “DN” jumper position for each board revision. Note that on Revision 2 of the board, two separate LEDs have been used. For additional information about the functionality of pins connected to the LEDs (with the exception of D2), refer to the DP83640 datasheet. -
Page 11: Table Of Jumpers
DP83640 DEMO BOARD USER GUIDE Table of Jumpers Table 6. List of Jumpers Jumper Name Function Default Setting Power J11/J12 Selects device 3.3 V source (Default MII_3V3) MII 5V/3V3 Bypasses 3.3 V regulator for 3.3 V MII supply Open MDIO/MDC Access MDC_SEL... -
Page 12: Modification For Fiber Operation
Access to the device registers is available with the use of National’s Analog LaunchPAD software. Refer to the DP83640 datasheet for detailed information on specific registers and to the National Semiconductor website (www.national.com) for the most recent version of the Analog LaunchPAD programming software. -
Page 13: 2.11 Board Revision Differences
DP83640 DEMO BOARD USER GUIDE 2.11 Board Revision Differences The following table highlights the differences between the board revisions. Table 7. Board Revision Differences Revision 1 Revision 2 Revision 3 Board Number: Board Number: Board Number: 551013211-001 Rev A 551013211-002 Rev A 551013211-003 Rev A Strap Polarity and LEDs... - Page 14 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
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