We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 5686

1.5i XC4000XL PAR - Router fails to meet timing on TBUF nets, but re-route is successful.


Cases have been seen where PAR failed to meet timing on paths containing
multiple driver TBUF nets, but it was noticed that re-entrant routes using PAR
or EPIC easily met timing. This problem is due to to a bug where PAR routes
and locks nets during the "pre-assignment phase", but fails to later unlock the
nets as it should.

A re-entrent route or re-route in EPIC is successful because the net locking
mechanism is gone.


This problem is fixed in vesion 2.1i, currently scheduled for 6/99. Meanwhile
the problem can be re-routed by using a re-entrant routing pass.
AR# 5686
日期 10/21/2008
状态 Archive
Type 综合文章