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| XC3000 | XC4000E | XC4000X | XC5200 | XC9000 | Spartan | SpartanXL | Spartan2 | Virtex |
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| Primitive | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive |
The GND signal tag, or parameter, forces a net or input function to a Low logic level. A net tied to GND cannot have any other source.
When the logic-trimming software or fitter encounters a net or input function tied to GND, it removes any logic that is disabled by the GND signal. The GND signal is only implemented when the disabled logic cannot be removed.