发明授权
- 专利标题: Programmable logic cells with local connections
- 专利标题(中): 具有本地连接的可编程逻辑单元
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申请号: US11044386申请日: 2005-01-27
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公开(公告)号: US07605605B2公开(公告)日: 2009-10-20
- 发明人: Hare K. Verma , Ravi Sunkavalli , Sudip Nag , Conrad Kong , Bo Hu , Chandra Mulpuri , Ashok Vittal
- 申请人: Hare K. Verma , Ravi Sunkavalli , Sudip Nag , Conrad Kong , Bo Hu , Chandra Mulpuri , Ashok Vittal
- 申请人地址: US CA Santa Clara
- 专利权人: Cswitch Corporation
- 当前专利权人: Cswitch Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Intellectual Equity
- 代理商 Peter Su
- 主分类号: H03K19/177
- IPC分类号: H03K19/177
摘要:
A programmable logic structure is disclosed employing input logic routing cell (ILRC) multiplexers and output logic routing cell (OLRC) multiplexers for making local connections between dedicated logic cells. In a simple programmable logic structure, a dedicated logic cell (DLC) is implemented in a programmable logic structure comprising multiple ILRC multiplexers for port A and multiple OLRC multiplexers for port B. In a multi-level programmable logic structure, multiple columns of dedicated logic cells is designed with columns of dedicated local cells adjacent to each other where each DLC column is used to implement a particular logic function. In a first embodiment, local connections can be made between dedicated logic cells, e.g. an OLRC in a first DLC at level L making local point-to-point connections to an ILRC in a second DLC at level L+1. In a second embodiment, local connections can be made from any other dedicated logic cells, whether positioned horizontally or vertically relative to a relative point or multiplexer, and from any offset from a current logic and routing cell (LRC). In a third embodiment, local connections can be made by stitching a first OLRC to a second OLRC (for connecting to an ILRC), which allows lines from other columns or levels of DLC to reach an ILRC for a fast local interconnect.
公开/授权文献
- US20060164120A1 Programmable logic cells with Local Connections 公开/授权日:2006-07-27