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AR# 38871

Virtex-5 - IDELAY - Why is the RST grounded in the .ncd when fixed tap-delay mode is used?

Description

Why is the RST grounded in the .ncd when fixed tap-delay mode is used?

Solution

The IDELAY's RST is used to reset the delay chain to a pre-programmed value. When fixed mode is used the delay value is set to a number specified by the IOBDELAY_VALUE and cannot be reset.
AR# 38871
Date Created 11/03/2010
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