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AM6526: Impact of i2022 errata on AM65xx

Hideaki Matsumoto
Genius 9050 points
Part Number: AM6526

Hello,

We are concerned about i2022 errata of AM65xx. It describes that only register DDRPHY_ZQ0PR0 can be used to program output driver impedance and on-die termination for both address/control and data.

What does this errata and workaround impact to ?

In generally, layout topologies are different between address/control and data. Therefore, we think that there is big restriction for layout design by this errata. Is this correct ?

Thanks and regards,
Hideaki

  • 0
    TI__Guru* 85990 points
    Hideaki, you are correct that typically there are different controls for addr/ctrl and data, but because of the errata, these controls are common across addr/data and ctrl.
    Ensure that your customer follows the DDR Layout Design Guidelines (www.ti.com/.../spraci2) and High Speed layout guidelines (www.ti.com/.../spraar7).
    We recommend a 34.3ohm driver setting in the EMIF tool because of this errata. With this setting and following the design guidelines, your customer should not have any issues.

    Regards,
    James