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AR# 39346

Virtex-5 - PLL_ADV wizard gives incorrect FOUTMAX for some devices

Description

For the Virtex-5PLL_ADV, the wizard gives incorrect FOUTMAX for theLX155, LX155T and FX100T devices for all three speed grades.

Solution

This is a Known issue and will be fixed in a later version of Architecture Wizard.You should adhere to the values in the Virtex-5 FPGA data sheet.

The workaround for this is to set the output divider higher so the output frequency is less than 500 MHz, and then use the HDL generated by the wizard in your design. You can edit this to the correct output divider setting to get 600 MHz.
AR# 39346
Date Created 12/03/2010
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Virtex-5 FXT
  • Virtex-5 LX
  • Virtex-5 LXT
  • More
  • Virtex-5 SXT
  • Virtex-5 TXT
  • Virtex-5Q
  • Virtex-5QV
  • Less