7 Replies Latest reply on Nov 1, 2020 9:28 PM by MaRe_4628281

    HyperBus impedance


      My application will use a NXP imxRT1050 FlexSPI summunication with two memory devices:

        Cypress S27KS0641DPBHV020

        Cypress S26KS256SDPBHV020

      Cypress Document AN211622, section 4.1 recommends that the connecting transmission lines have 50 ohms characteristic impedance. 

      The question:  Why 50 ohms characteristic impedance?  Neither the memory device drivers and receivers nor, insofar as I know, the FlexSPI port drivers and receivers, have 50 homs characteristic impedance.