发明授权
- 专利标题: Flexible I/O routing resources
- 专利标题(中): 灵活的I / O路由资源
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申请号: US10289629申请日: 2002-11-06
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公开(公告)号: US06826741B1公开(公告)日: 2004-11-30
- 发明人: Brian D. Johnson , Andy L. Lee , Cameron McClintock , Triet Nguyen , David Jefferson , Paul Leventis , David Lewis , Vaughn Betz , Michael Chan
- 申请人: Brian D. Johnson , Andy L. Lee , Cameron McClintock , Triet Nguyen , David Jefferson , Paul Leventis , David Lewis , Vaughn Betz , Michael Chan
- 主分类号: G06F1750
- IPC分类号: G06F1750
摘要:
In one aspect, flexible routing resources provided are comprising an arrangement of staggered line segments on a periphery of an electronic device. In another aspect, I/O bus lines a re coupled to receive signals from and to provide signals to other bus lines, core routing, and I/O circuitry, thus facilitating the use of the I/O bus for a variety of routes that may include I/O-to-core, core-to-I/O and core-to-core routes. In another aspect, a length of I/O bus lines is optimized for speed over long signal routes with high fanout. In another aspect, the loading effects of high fanout are minimized by using a plurality of tapping buffers to couple lines to both core routing and to I/O circuitry. In another aspect, a spiraling technique is provided that allows a continuous bus having line segments of consistent length whether or not the number of I/O blocks is an integral multiple of the selected logical length for line segments.