发明授权
- 专利标题: Automatic asynchronous signal pipelining
- 专利标题(中): 自动异步信号流水线
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申请号: US14447244申请日: 2014-07-30
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公开(公告)号: US09183336B1公开(公告)日: 2015-11-10
- 发明人: Mark Bourgeault , Ryan Fung , David Lewis
- 申请人: Altera Corporation
- 申请人地址: US CA San Jose
- 专利权人: Altera Corporation
- 当前专利权人: Altera Corporation
- 当前专利权人地址: US CA San Jose
- 代理机构: Weaver Austin Villeneuve & Sampson LLP
- 主分类号: G06F17/50
- IPC分类号: G06F17/50 ; H03K19/177 ; H03K19/003
摘要:
An electronic design automation (EDA) tool alters a user's netlist to provide timing success for distribution of asynchronous signals. Distribution networks are used with the addition of pipeline registers before and/or after the distribution buffer. Or, a tree of pipeline registers is inserted between the asynchronous source and the destination registers. Or, any number of distribution networks are stitched together and pipeline stages may be inserted before and/or after each distribution buffer. Or, beneficial skew is utilized by introducing a delay component that skews a clock signal. The skewed clock signal drives a pipeline register that is inserted before a distribution buffer in order to improve timing margin. Any of various compilation techniques may be used within the EDA tool to solve the problem of distributing high-speed, high-fanout asynchronous signals. The technique has utility for high-performance FPGAs and structured ASIC families, as well as for low-cost FPGAs and other types of logic devices.
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