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Altera_Forum's avatar
Altera_Forum
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16 years ago

DDR2 SDRAM termination

In the CYCLONE||| development kit host board there are termination resistors present on the board for the DDR2 SDRAM. Termination is already included inside the DDR2 SDRAM chips. So why are the termi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

ODT is only needed for bidirectional signals. Acts as serial resistor in ddr when controller is receiving and parallel resistor in ddr when controller is driving. We have a design with OCT and ODT with no extra resistors for ddr termination on the board.