发明授权
- 专利标题： Programmable logic device with method of preventing readback
- 专利标题（中）： 可编程逻辑器件，具有防止回读的方法
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申请号： US09724975申请日： 2000-11-28
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公开(公告)号： US06981153B1公开(公告)日： 2005-12-27
- 发明人: Raymond C. Pang , Walter N. Sze , John M. Thendean , Stephen M. Trimberger , Jennifer Wong
- 申请人： Raymond C. Pang , Walter N. Sze , John M. Thendean , Stephen M. Trimberger , Jennifer Wong
- 申请人地址： US CA San Jose
- 专利权人： Xilinx, Inc.
- 当前专利权人： Xilinx, Inc.
- 当前专利权人地址： US CA San Jose
- 代理商 Edel M. Young; LeRoy D. Maunu; Justin Liu
- 主分类号： H03K19/173
- IPC分类号： H03K19/173 ; G06F17/50 ; G06F21/00 ; G09C1/00 ; H04L9/10 ; G06F12/14
摘要：
It is sometimes desirable to protect a design used in a PLD from being copied. If the design is stored in a different device from the PLD and read into the PLD through a bitstream, the design may be encrypted as it is read into the PLD and decrypted within the PLD before being loaded into configuration memory cells for configuring the PLD. According to the invention, in such a device, a method is provided to prevent the design from being read back from the PLD in its decrypted state if it had been encrypted when loaded into the PLD.
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