User Electronic Signature
{{Short description|User-defined bitfield in a programmable logic device}}
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The User Electronic Signature (UES) is a bitfield with user-defined content in a programmable logic device (PLD).{{Cite web |date=February 2002 |title=User Electronic Signature |url=https://www.latticesemi.com/-/media/LatticeSemi/Documents/ApplicationNotes/UZ/UserElectronicSignature.ashx?la=en |access-date=2023-03-17 |website=Lattice Semiconductor Corporation}} It is usually used for the storage of the ID and/or version number of the PLD, suited for serial identification. Examples for PLD's with a UES are the industry standards GAL16V8 and GAL22V10. The size of the UES is device-dependent.