External Memory Interface Handbook Volume 2: Design Guidelines

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ID 683385
Date 5/08/2017
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3.2.4.2. Write to Memory Using an ODT Setting of 150-ohm

The following figure shows the double parallel termination scheme (Class II) using ODT on the memory with the memory-side series resistor when the FPGA is writing to the memory using a 25-ohm OCT drive strength setting on the FPGA.

Figure 40. Double Parallel Termination Scheme (Class II) Using ODT on DDR2 SDRAM DIMM with Memory-side Series Resistor


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