发明授权
US5566322A Method and apparatus for performing read accesses from a counter which
avoid large rollover error when multiple read access cycles are used
失效
用于从计数器执行读取访问的方法和装置，其在使用多个读取访问周期时避免大的翻转错误
- 专利标题： Method and apparatus for performing read accesses from a counter which avoid large rollover error when multiple read access cycles are used
- 专利标题（中）： 用于从计数器执行读取访问的方法和装置，其在使用多个读取访问周期时避免大的翻转错误
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申请号： US154774申请日： 1993-11-19
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公开(公告)号： US5566322A公开(公告)日： 1996-10-15
- 发明人: Daniel W. Pechonis , Joseph Jelemensky , Oded Yishay , John B. Waite
- 申请人： Daniel W. Pechonis , Joseph Jelemensky , Oded Yishay , John B. Waite
- 申请人地址： IL Schaumburg
- 专利权人： Motorola Inc.
- 当前专利权人： Motorola Inc.
- 当前专利权人地址： IL Schaumburg
- 主分类号： G06F9/32
- IPC分类号： G06F9/32 ; G06F13/14 ; G06M3/12
摘要：
Method and apparatus for performing read accesses from a counter (40) while avoiding the large rollover error that may occur when the counter (40) is read using more than one read access cycle. In one embodiment, the present invention monitors the most significant bit of the lower portion (44) of counter (40) for a transition indicating that a rollover has taken place. If a rollover has not occurred, read accesses take place in the normal manner. However, if a rollover has occurred during the latency period between a read access from the upper portion (42) of counter (40) and a corresponding read access from the lower portion (44) of counter (40), the read access from the lower portion (44) is inhibited and a default value is placed on the bus (36) instead.
公开/授权文献
- US6009028A Failure self-diagnosis device for semiconductor memory 公开/授权日：1999-12-28
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