发明申请
US20090129598A1 Microprocessor locking circuit and locking method therefor with locking function
审中-公开
微处理器锁定电路及其锁定方法具有锁定功能
- 专利标题： Microprocessor locking circuit and locking method therefor with locking function
- 专利标题（中）： 微处理器锁定电路及其锁定方法具有锁定功能
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申请号： US12072556申请日： 2008-02-26
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公开(公告)号： US20090129598A1公开(公告)日： 2009-05-21
- 发明人: David Chen , Chun-Ku Lin
- 申请人： David Chen , Chun-Ku Lin
- 专利权人： Holtek Semiconductor, Inc.
- 当前专利权人： Holtek Semiconductor, Inc.
- 优先权： TW96144197 20071121
- 主分类号： H04L9/00
- IPC分类号： H04L9/00
摘要：
A microprocessor locking circuit for use in a microprocessor comprising at least one program code is provided. The microprocessor locking circuit includes a predetermined key, wherein the microprocessor locking circuit receives an input key and compares the input key with the predetermined key after a reset period starts, wherein the program code is unlocked if the input key is identical to the predetermined key, and the program code is locked if the input key is different from the predetermined key.
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