How to disable only previous week in Jquery datetimepicker?

Question

How can I disable only previous week in Jquery datetimepicker? All the dates before previous week should be enabled.Please see my code

if($('.datetimepicker').length > 0 ){
    $('.datetimepicker').datetimepicker({   
        minDate: d,     
        format: 'MM/DD/YYYY'    
   
    });

where the value of d I am passing through some function.