| 摘要 |
PROBLEM TO BE SOLVED: To modify a data strobe which allows corresponding to a system that runs faster. SOLUTION: Memory devices 130/440/450-1 to 130/440/450-8 have two operating modes. In a first mode the data strobes, 170-1 to 170-8 are source synchronous and are driven by the memory devices when data is being transmitted. In a second mode, the data strobes are not driven by the memory devices. In this mode, the data strobe signals 170-1 to 170-8 are used as a free running clock for sampling write data. Capture of the data read by a controller 110/425 is timed by the controller 110/425, by using a calibrated internal timing reference from a system clock. COPYRIGHT: (C)2011,JPO&INPIT
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