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DDR4 clock (MCK) termination

Question asked by Trond Wang on Feb 12, 2018
Latest reply on Feb 12, 2018 by ufedor

Hi NXP, in the reference design LS1043ARDB-PA/PB the termination resistor (R470 and R468) is 36 ohm for the differential clock.

The termination resistor for the single ended signals of the address bus/control  (R186+..) is 39 ohm.

 

Why do you use a lower resistance value for the differential signal.than for the adress bus/ control bus?

 

regards Trond Inge Wang

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