- 专利标题: Distributed memory in field-programmable gate array integrated circuit devices
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申请号: US11320253申请日: 2005-12-27
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公开(公告)号: US07391236B2公开(公告)日: 2008-06-24
- 发明人: David Lewis , Paul Leventis , Vaughn Betz , Thomas Yau-Tsun Wong , Andy Lee , Philip Pan
- 申请人: David Lewis , Paul Leventis , Vaughn Betz , Thomas Yau-Tsun Wong , Andy Lee , Philip Pan
- 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: Ropes & Gray LLP
- 代理商 Robert R. Jackson
- 主分类号: H03K19/177
- IPC分类号: H03K19/177
摘要:
Circuitry for facilitating the use of the memory elements in the look-up tables (“LUTs”) of a field programmable gate array (“FPGA”) as user-accessible, distributed RAM. For example, a register associated with a LUT and that is not needed in the read data path in user RAM mode can be used to register data for writing in user RAM mode. As another example, an otherwise unneeded register associated with a LUT can be used to provide a synchronous read address signal for user RAM mode. Several other features are shown for similarly facilitating user RAM mode with minimal (if any) additional circuitry being required in the FPGA.
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