发明公开
EP0277152A4 ONE-TIME PROGRAMMABLE DATA SECURITY SYSTEM FOR PROGRAMMABLE LOGIC DEVICE
失效
用于可编程逻辑器件的一次可编程数据安全系统
- 专利标题： ONE-TIME PROGRAMMABLE DATA SECURITY SYSTEM FOR PROGRAMMABLE LOGIC DEVICE
- 专利标题（中）： 用于可编程逻辑器件的一次可编程数据安全系统
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申请号： EP87904763申请日： 1987-06-26
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公开(公告)号： EP0277152A4公开(公告)日： 1991-01-02
- 发明人: TURNER, JOHN, E.
- 申请人： LATTICE SEMICONDUCTOR CORPORATION
- 专利权人： LATTICE SEMICONDUCTOR CORPORATION
- 当前专利权人： LATTICE SEMICONDUCTOR CORPORATION
- 优先权： US88260286 1986-07-07
- 主分类号： G06F12/14
- IPC分类号： G06F12/14 ; G06F21/02 ; G06F21/24 ; G11C7/24 ; G11C16/22 ; G11C17/18 ; H03K19/177 ; G06F7/38
摘要：
A data security fuse system (35) for allowing one-time programmability of protected data cells in a reprogrammable logic device (10), which may determine, for example, the logic architecture of the device. The system includes a fuse enable circuit (100) which may be erased to the disabled state only prior to packaging of the device during manufacture. The protected data cells may be selected for programming by a decoder (30) which decodes cell selection signals. A security fuse circuit (300) is enabled by a fuse enable signal (SFE) from the activated fuse enable circuit. The security fuse circuit (300) allows the protected cells to be selected once for programming after the system has been activated, and thereafter defeats any attempts to access the protected data cells.
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