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How is it possible to use 4 ODT signals for 8 ranks application?

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balamanikandan

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hi

A DDR3 memory controller has the following pins : ODT0,ODT1,ODT2 and ODT3

But it has the option to support 8 ranks.

In general, One ODT signal is required per rank. Am I right?

How is it possible to use 4 ODT signals for 8 Ranks application?

Please explain me.
 

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