A method of operating a programmable logic device, including the steps of enabling resources of the programmable logic device being used in a circuit design implemented by the programmable logic device, and disabling unused or inactive resources of the programmable logic device that are not being used...http://www.google.com.tw/patents/US7098689?utm_source=gb-gplus-share專利 US7098689 - Disabling unused/inactive resources in programmable logic devices for static power reduction