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AR# 32062

10.1i Architecture Wizard - PLL REF_JITTER value set in ps converts to incorrect unit interval value

Description

When I enter the PLL REF_JITTER value in picoseconds (ps) using Architecture Wizard, the tool does not correctly convert this into Unit Intervals (UI).

Solution


The REF_JITTER value for the Virtex-5 PLL must be set in UI. The Architecture Wizard software tool allows the user to enter the value in either ps or UI, and automatically converts the value into UI. In the 10.1i version of the tool, the conversion from picoseconds to Unit Intervals is done incorrectly.



The workaround for this issue is to enter the REF_JITTER value into Architecture Wizard in Unit Intervals.
AR# 32062
Date Created 01/21/2009
Last Updated 08/10/2010
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
Tools
  • ISE Design Suite - 10.1
  • ISE Design Suite - 10.1 sp1
  • ISE Design Suite - 10.1 sp2
  • ISE Design Suite - 10.1 sp3
IP
  • PLL Module