Inventors:
Chi Minh Nguyen - San Jose CA, US
Chan-Chi Jason Cheng - Fremont CA, US
Timothy S. Swensen - Santa Clara CA, US
Giai Trinh - Milpitas CA, US
Yi Chiang - San Jose CA, US
Assignee:
Lattice Semiconductor Corporation - Hillsboro OR
International Classification:
H03K 19/177
US Classification:
326 41, 326 38, 36523002, 36523003
Abstract:
A programmable logic device, in accordance with an embodiment of the present invention, includes a plurality of multiplexers, having fuse input terminals and input signal terminals, and a plurality of associated fuses providing fuse signals to the fuse input terminals to control selection of the input signal terminals. The fuses in a first state select a first input signal terminal of the input signal terminals, with a first multiplexer from the plurality of multiplexers receiving a first logic level signal at the first input signal terminal and providing the first logic level signal to the first input signal terminal of a first set of the plurality of multiplexers. The fuses associated with the first set are adapted to be programmed before the fuses associated with the first multiplexer.