ModuleWare Reference Guide - Hornad

Logic PartsThree-state bus (tribus)Table 2-34. Three-state Bus Truth Table (cont.)tin(i) tena dout(i)0 0 ‘Z’1 0 ‘Z’ParametersTable 2-35. Three-state Bus ParametersParameter Values Defaultdin, tin, dout Port widths (must be > 0) AutomaticDesign Rule Checks• An error is issued if the width of any port cannot be determined, port ena and tena do nothave a fixed width of 1 or if ports din, tin and dout are not the same width.• A warning is issued and HDL generation fails for this part if any of the ports are notconnected.54ModuleWare Reference Manual, Library Version 1.9September 18, 2008