8
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.
2.7
SMA Connectors
For convenience, two SMA connectors are provided (J2 and J34). J2 can be connected to the
CLK_OUT pin by placing a 0 ohm resistor at R1. Similarly, J34 can be connected to GPIO9 by
placing a 0 ohm resistor at R86. 50 ohm resistors can be placed at R2 and R62 to provide a
terminating impedance for test equipment, if desired.
