National Semiconductor DP83640 Precision PHYTER, User Manual

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10
DP83640 DEMO BOARD USER GUIDE
Interface
J1 GPIO Header Allows access to GPIO pins
J2 CLK_1588 Allows access to CLK_OUT signal
J6 JTAG JTAG interface for DP83640
J7 USB USB Mini B connector
J34 GPIO9 SMA Connector to GPIO9
J46 Connector RJ-45 connector
J53 FX Transceiver HP FX transceiver (AFBR5803Z) - Not stuffed in
copper configuration
J56 MII Header Allow connection to MII pins
J58 MII Male
Connector Smartbits Interface
J60 ALP Connector Internal Use – Not placed on Customer Demo
Boards
2.9 Modification for Fiber Operation
Provisions have been made to allow for the evaluation board to be configured for fiber mode
operation. To modify the board for fiber operation, the components on Sheet 7 of the schematic
should be placed, with R113, R114, R117, R118, and R128 all 0 ohm resistors. A 2.2k ohm
resistor should also be placed in R46 to strap the device into fiber mode. Resistors R112, R115,
R116, and R119 should be removed.
2.10 Register Access Software
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.