发明名称 |
Method for automatic adjustment of timing of double data rate interface |
摘要 |
Timing of a write and read strobes for a memory having a double data rate (DDR) interface are automatically adjusted using write-read operations. A first and a second value of the write and read strobes are determined for a first write-read operation having the read data match the write data. A second write-read operation is performed for each of a plurality of third values for the write strobe at the second value for the read strobe set. A center of the third values having the read data match the write data is determined. A third write-read operation is performed for each of a plurality of fifth values for the read strobe at the fourth value of the write strobe. A center of the fifth values having the read data match the write data is determined. The timing of the write and read strobes are set to the centers.
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申请公布号 |
US7636828(B2) |
申请公布日期 |
2009.12.22 |
申请号 |
US20060590116 |
申请日期 |
2006.10.31 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
VANZANTE CRAIG;LUK KING WAYNE |
分类号 |
G06F12/00 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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