QorIQ T4160 DDR MDIC resistor value

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QorIQ T4160 DDR MDIC resistor value

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dibing
Contributor I

For a QorIQ T4160 based design, as per AN3490 document, DDR3 design checklist point 38, MDIC pins need to be connected to GND/DDR power via a 40 ohm resistor, but as per T4160 datasheet the resistor value required is 187 ohm (for rev2). Which is the correct value that is required ?

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ufedor
NXP Employee
NXP Employee

MDIC calibration resistors have different values for different series/revisions of processors.

It is required to refer to the specific processor's Data Sheet.

187 ohm (for T4160 Rev.2) is correct.

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