Do I must use the PIN MASTER_RESET in AD9911?

Hello, I am working on the AD9911 with a DSP. In the control line, I found this device do not have a pin I/O_RESET as in AD9910, and I confused with use of reseting device.

Does this pin MASTER_RESET must be  connect out and be used?  When starting up AD9911, do I must reset AD9911?  In my current design, I made this pin fixed connected with GND and do not connected to DSP. Untill now this DDS device works well but I am worried when no signal comes out how could I reset it and make it right. Thank you very much.

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