Xilinx Spartan-3E - DDR SDRAM Series Termination and FX2 Connector Differential Termination

156 www.xilinx.com Spartan-3E Start Kit Board User Guide
UG230 (v1.0) March 9, 2006
Appendix A: Schematics
R
DDR SDRAM Series Termination and FX2 Connector Differential
Termination
Resistors R160 through R201 represent the series termination resistors for the DDR
SDRAM. See Chapter 13, “DDR SDRAM,” for additional information.
Resistors R202 through R210 are not loaded on the board. These landing pads provide
optional connections for 100Ω differential termination resistors. See “Using Differential
Inputs,” page 118 for additional information.