This is the xilinx application note xapp851 the Chinese version. This application note describes the Virtex ™ -5 devices to achieve 200 MHz DDR SDRAM (JEDEC DDR400 (PC3200) standard) controller. The Design and Implementation of the use of IDELAY unit to adjust read data timing. Reading the data calibration and adjust the timing for completion of this controller.

c_xapp851.pdf

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