Custom PCB board with aduc854

Hi

I have connected to the Aduc854 controller a Bluetooth board from Silicon labs which has a bluetooth radio board(BRD4306A) and Soc bgm13p22 via UART. 

I am talking via bluetooth with my PC to this system(Aduc854+bluetooth radio board(BRD4306A) and Soc bgm13p22 via UART).

The problem I am having is I have also designed a custom PCB board for this bluetooth radio board and connected to Aduc854 via UART and now the speed of sending notifications out from radio board to the PC is much slower as compared to company manufactured Silicon labs bluetooth board.

This is the link to silicon labs datasheet-->  https://www.silabs.com/documents/login/data-sheets/bgm13p-datasheet.pdf

Any suggestions are highly appreciated.

Thanks

Shikhar

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