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ADF7021 getting an information about the end of data (SPI mode)

Hi everybody!

I'm so happy that i found the vendor site where can I ask about what i'm not sure in ADF7021.

I know that SWD pin can work as an interrupt which informs when SYNC sequence of bits are detected.
I plan to use SWD as an interrupt to switch SPI received on. But I don't know how to end receiving data.
How can ADF7021 inform my MCU when SPI transfer ends? Because my MCU will not treat SPI clock end as end of transmission. That's why i want to do it externally?
Is there possible to break out a signal which informs, when there is end of received bits?

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