Answers Database

M1.5: TNM placed on net between PAD and BUFG/IBUF not forward traced


Record #3016

Product Family:  Software

Product Line:  FPGA Implementation

Problem Title:
M1.5: TNM placed on net between PAD and BUFG/IBUF not forward traced


Problem Description:
Keywords: TNM, propagate, forward trace

Urgency: standard


For the following arrangement:

IPAD -- clockpad -- IBUF -- clock

Placing a TNM on "clockpad" will not forward propagate the
TNM to all flip-flops this net goes to.


Solution 1:

A TNM must be placed on
the output of the clock buffer (BUFG,BUFGP,BUFGS,BUFGLS,BUFGE)
or the input buffer (IBUF) for forward propagation to occur:

NET clock TNM = mygroup;






End of Record #3016