Answers Database

XC3000A: Map ignores LOC on pads driving BUFG


Record #3563

Product Family:  Software

Product Line:  Merged Core

Problem Title:
XC3000A: Map ignores LOC on pads driving BUFG


Problem Description:
Keywords: map, par, bufg, gclk, aclk, tclkin, bclkin, loc, ucf

Urgency: standard

Desrciption: for 3kA designs, Map ingores attempts to LOC an input pad which dri
ves a BUFG to the desired TCLKIN or BCLKIN pin.


Solution 1:

Workaround: Instantiate either a GCLK or ACLK buffer instead of the generic BUFG
 clock buffer to force the clock to the desired TCLKIN or BCLKIN pin.



End of Record #3563