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SC-584: Value of DDR reference resistor (DMC0_RZQ)

Question asked by faumic on Sep 28, 2017
Latest reply on Nov 2, 2017 by AlClark


i am wondering why on the ADZS-SC584-EZLITE and also on the ADZS-SC587-EZLITE the reference resistor that is used for DDR calibration (Pin DMCX_RZQ) has a value of 34 Ohm instead of the in the datasheet recommended value of 240 Ohm. Also the EE-387 does not help me with this issue. What makes 34 Ohm the right value instead of 240 Ohm?