Configuring HMC983 CEN(pin 31) for power saving

Hello,

I'm currently working on a project where it would be beneficial to have an HMC983 power down or sleep when not in use. In the datasheet, pin 31 or CEN is mentioned very briefly for this purpose. I haven't been able to find any other resources online to help explain how to utilize this pin. Does anyone have suggestions for how to accomplish this or any resources you can point me towards?

Thank you