1 Reply Latest reply on Aug 20, 2013 12:48 AM by babu.borusu

    QDRll+ memory Termination

    babu.borusu

       Hi 

         

          In the qdrll+ memory controller , 

         

      Case 1: The ODT is enabled (LOW) RQ=182ohms then input impedance = 182/3.33 is 54.65ohms and  output impedance is 182/5 is 36.4 ohms, for the kit is working fine.

         

      Case 2 : The ODT is enabled (HIGH) RQ=182 ohms then input impedance=182/1.66 is 109.6 ohms and output impedance is 182/5 is 36.4 ohms , for the kit is working fine.

         

      How the termination are made. I am in confuse that  it is giving the output for the both cases is correct.  May i know how this works.

         

       

         

      Thanking you