Answers Database

M1.4 CPLD: Automatic Local Feedback optimization not yet supported for XC9500


Record #3125

Product Family:  Hardware

Product Line:  9500

Problem Title:
M1.4 CPLD: Automatic Local Feedback optimization not yet supported for
XC9500



Problem Description:
Keywords: xc9500, local feedback, loc

Urgency: standard

General Description:
Does the M1.4 CPLD fitter automatically optimize for local macrocell
feedback?


Solution 1:

The Automatic Feedback Optimization feature described in the CPLD
Schematic Design Guide and CPLD Synthesis Design Guide is not yet
supported. XC9500 Local Feedback still requires logic to be
explicitly mapped to the same function block using properties of
the form "LOC=FBnn".



End of Record #3125