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AM6422: spread spectrum clocking: restrictions when using UHS-I SD Cards

Part Number: AM6422

Tool/software:

Hi.

We´re using AM6422 with UHS-I (up to SDR104) SD-Card on MMCSD1.

We have several peaks in the radiated emission test spectrum which are clearly related to SD-Card, since they where gone when the card was removed.

To reduce those spikes, I want to enable SSC on PLL2.

Are there any restrictions to the max. supported interface performance of the SD-Card when using SSC?

Thank you!

BR,

Christian