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ZC0001's avatar
ZC0001
Icon for New Contributor rankNew Contributor
6 years ago

About using the RZQ for termination calibration

Hi,all.

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According the Purpose IOs Handbook, different I/O Standards need different RZQ value for calibration, but only one RZQ are used for DDR3 controller. How to solve this problem?

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Best Regards!

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1 Reply

  • NurAida_A_Intel's avatar
    NurAida_A_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    Hi Sir,

    The resistor value depends on the OCT termination type and signal leveling (for example 100R RZQ resistor value for 1.8V LVCMOS to allow 25R or 50R series termination).

    Assuming the Rs = 50ohm, hence please use RZQ = 100ohm.

    Hope this clear.

    Thanks

    Regards,

    Aida