Method and apparatus for fast programming during manufacturing and for in-system write operations at a low voltage for a programmable logic device

Programmable logic device, aufwei- send: a first voltage input; a second voltage input; means coupled to said first voltage input first detecting circuit, wherein the first detection circuit detects whether a voltage applied to the first voltage input voltage exceeds a first predetermined value; means coupled to said first detecting circuit comprises first configuration circuit, wherein the first configuration circuit when the first detection circuit detects that the voltage exceeds the first predetermined value, configures the programmable logic device so that first an adequate for programming and erasing operations current through the receives voltage input; means coupled to said first voltage input second detection circuit, wherein said second detection circuit detects whether the voltage applied to the first voltage input voltage is less than a second predetermined value; a second configuration circuit coupled to the first and the second detection circuit and the second voltage input, said first configuration circuit configures the programmable logic device so that the programming and for ...