DCI impedance value
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http://www.xilinx.com/support/answers/11450.htm
IBIS models can be downloaded here:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
SPICE models can be downloaded here:
http://support.xilinx.com/support/software/spice/spice-request.htm
If you require a SPICE model for Virtex/-E or Spartan-II/-IIE, please contact Xilinx Customer Support:
http://www.xilinx.com/support/mysupport.htm
Virtex-II/Virtex-II Pro/Virtex-4/Virtex-5IBIS/SPICE models - How does an IBIS or SPICE simulation account forthe DCI impedance value?
AR# 11450 Part HW-SelectIO Last Modified 2007-10-16 00:00:00.0 Status Active Keywords Virtex,DCI, IBIS, SPICE, model, impedance, on, chip, termination, simulate,simulation, reference, resistor, output, input, I/O, IODescription
Keywords:Virtex, DCI, IBIS, SPICE, model, impedance, on, chip, termination,simulate, simulation, reference, resistor, output, input, I/O, IO
Inan IBIS or SPICE simulation of any of the Virtex-II/Virtex-IIPro/Virtex-4/Virtex-5 I/O standards that employ DCI (digitallycontrolled impedance), how does the simulation account for theimpedance value?
Solution
Any IBIS or SPICE model represents a single DCI impedance setting. Withthe exception of 40 and 65 ohm LVDCI models in the Virtex-II IBISrelease, and 25/40/65/75 ohm LVDCI models in the Virtex-II SPICErelease, all Virtex-II, Virtex-II Pro, Virtex-4 and Virtex-5 DCI modelsrepresent 50 ohms termination.IBIS models can be downloaded here:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
SPICE models can be downloaded here:
http://support.xilinx.com/support/software/spice/spice-request.htm
If you require a SPICE model for Virtex/-E or Spartan-II/-IIE, please contact Xilinx Customer Support:
http://www.xilinx.com/support/mysupport.htm
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