how to get set able frequency at IOUT

What frequency is the desired output?

Setting the frequency register involves several transactions on the SPI bus. I recommend following the flow diagram in Figure 25. First set the RESET bit in the control register, followed by two transactions to write the frequency register. Finally, clear the RESET bit to get the DDS running. Each transaction is 16 bits in length. Note that data is captured on the falling edge of SCLK, not the rising edge.

Thanks for the reply.
The desired output frequency is 7 kHz. I followed the same sequence, and the data is captured on the falling edge of SCLK as well.
However, I’m still not getting the expected output. I’ll recheck the setup once again and confirm.

For this configuration, you need to issue 4 SPI transactions with the following data:

0x2108   0x4AC1   0x4007   0x0008

The first and last ones correspond to the control register. The middle ones correspond to the frequency register.

Thanks for the reply, problem has been solved.