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ML365 Virtex-II Pro QDR II SRAM Mem. Board
1-800-255-7778
UG066 (v1.0) June 29, 2004
Chapter 4:
Signal Integrity Recommendations and Simulations
R
Address and Control Signal Simulations
The simulations in this subsection test the uni-directional address and control signals from
the FPGA to the QDR II SRAM, Component B, U11, Bit 4. Simulations were performed for
typical, slow/weak, and fast/strong driver cases.
All of the clock signal simulations use the following test conditions for typical, slow weak,
and fast strong cases
•
Topology for data signals: 50-ohm Transmission lines
•
At the memory: 100-ohm parallel split termination pulled up to Vdd = 1.8 V
(equivalent to 50-ohm termination pulled up to Vref = 0.9V)
•
At the FPGA: HSTL_18_C2 drivers
shows address and control signal terminations.
Typical Case Simulation at All Memory Components
shows the typical case simulation waveforms for the QDR II SRAM,
Component B, Bit 4.
Figure 4-9:
Address and Control Signal Terminations
ml365_03_061504
QDR II SRAM
FPGA
Vdd
Product Not Recommended for New Designs