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# 36259

Timing - Disabling PTC "lat_d_q", Data to Output Transparent Latch


When I run Timing Analysis, PTC (Path Tracing Control)optionlat_d_q is disabled and latches are treated as transparent. Now, when I enable PTC, lat_d_q, latches should be treated as synchronous. But, when I look at the timing report I see that both paths to the latches and through the latches are reported.


This is expected behavior. When you enable the PTC option, both sets of information are reported.

Essentially, the tools report both options.

AR# 36259
Date 11/12/2012
Status Active
Type General Article
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
  • More
  • ISE Design Suite - 11.4
  • ISE Design Suite - 11.5
  • ISE Design Suite - 12.1
  • Less
Page Bookmarked