DP83848I: DP83848I, Very low transfer speed via RMII

Part Number: DP83848I

Hi Sir,

I use DP83848 and Hi3798cv200(Hisilicon) via RMII, but have a very low speed between them, Could you help to check where the problem is? Thanks.

here is the transfer graph: it is very slow.

Here is the schematic:

Here is the TX wave:

Here is the RX wave:

Thanks and wait for you support.