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AR# 23180

8.2i CPLDFit - Fitter Report incorrectly reports tristate equations when GTS is used as the tristate enable


When the Global Tri-State (GTS) is used as a tristate control, the HTML fitter report omits the equation for the tristate enable.


The HTML Fitter report incorrectly omits the GTS enabled tristate equation, showing only the data buffer. 



OUT_A_I <= IN_A;  


Should look like this: 

OUT_A_I <= IN_A; 

OUT_A <= OUT_A_I when OUT_A_OE = '1' else 'Z';  


The ABEL-style equations show the implemented logic correctly and the device will behave correctly. This is simply a report issue with VHDL and Verilog style equations.

AR# 23180
Date Created 09/04/2007
Last Updated 05/08/2014
Status Archive
Type General Article