Configuration memory for programmable logic device

专利名称：Configuration memory for programmable

logic device

发明人：Randy C. Steele申请号：US07/502571申请日：19900330公开号：US05121359A公开日：19920609

摘要：A programmable logic integrated circuit device utilizes volatile memoryelements such as SRAM for retaining configuration information. A circuit is provided aspart of the device for detecting loss of power on a supply input pin. When power loss isdetected, a backup voltage supply, packaged with the programmable logic device as aunit, is connected thereto. The backup power is used to supply voltage only to thoseportions of the device having volatile memory elements containing configurationinformation. Backup power is not provided to input and output buffers of the device,thereby preventing excess loads being placed upon the backup device because of eventswhich may occur external to the programmable logic device.

申请人：SGS-THOMSON MICROELECTRONICS, INC.

代理人：Kenneth C. Hill,Lisa K. Jorgenson,Richard K. Robinson

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