STM32 doesn't receive the value of register with address 0x0000 through MDIO in RFBTC11

Hi
STM32 doesn’t receive the value of register with address 0x0000 through MDIO in RFBTC11
I see in oscilloscope STM sends the impulses on MDIO line as in datasheet of QCA8334 in RBFTC11 convertor? but QCA8334 doesn’t answer with the value of register.

I see the VDC on TX 2,7V, on RX 3,3V

What is wrong?
thank You