- 专利标题: Method and apparatus for aligning multiple outputs of an FPGA
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申请号: US11716187申请日: 2007-03-09
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公开(公告)号: US07467056B2公开(公告)日: 2008-12-16
- 发明人: Eric Maniloff , Ronald Gagnon , Blake Toplis
- 申请人: Eric Maniloff , Ronald Gagnon , Blake Toplis
- 申请人地址: CA St. Laurent, Quebec
- 专利权人: Nortel Networks Limited
- 当前专利权人: Nortel Networks Limited
- 当前专利权人地址: CA St. Laurent, Quebec
- 代理机构: Anderson Gorecki & Manaras LLP
- 主分类号: H04B13/00
- IPC分类号: H04B13/00
摘要:
Each data lane connected to a FPGA and forming part of a SFI channel may be trained independently to enable the outputs from the FPGA to be aligned. In operation, a known fixed pattern is repeated on each of the data lanes with the exception of the data lane being trained. The short fixed pattern is smaller than an SERDES capture range so that the SERDES may temporarily lock onto the short fixed pattern for all data lanes other than the lane being trained. Training data is then transmitted on the lane being trained and the preskew delay for that lane is adjusted until the receiving component indicates that the lanes are aligned. This process may iterate to find acceptable preskew delay values for all lanes. By training the lanes one at a time and using a short repeating pattern on the untrained lanes, the SERDES may register that the untrained lanes are operating correctly so that the feedback from the SERDES is related only to the lane being trained.
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