How to pass data into directives into ng-repeat table - angularjs

Question

Now I have some directives which are used in some place, in one place I need to load the data to init them( if there are no data, keep it blank). Here is the template of one of the directives:
<div class="col-lg-12" style='z-index: 99998;'>
<span class="col-lg-12 col-md-12 right-inner-addon typeAhead">
<i class="glyphicon glyphicon-search" ng-show="isBillToEmpty"></i> <i ng-click="cleanBillTo()"
class="glyphicon glyphicon-close" ng-show="!isBillToEmpty" ></i></a> <input class="data "
id="billTo" ng-model="billTo"
typeahead=" billTos.ID as billTos.VALUE for billTos in getBillTos($viewValue)"
typeahead-input-formatter="formatBillToText($model)" type="text">
</span>
</div>
<div class="col-lg-12">
<span class="col-md-12"> <label id="labelBillTo" for="billTo">{{billToLabel}}</label>
</span>
</div>
DirectiveJS:
function($scope, BillToService) {
$scope.billTos = {};
$scope.billTo = '';
$scope.billToLabel = 'Bill To'
$scope.isBillToEmpty = true;
$scope.formatBillToText = function(model) {
for (var i = 0; i < $scope.billTos.length; i++) {
if (model === $scope.billTos[i].ID) {
return $scope.billTos[i].VALUE;
}
}
}
$scope.$watch('billTo', function() {
$scope.billToID = $scope.billTo;
if($scope.billTo.length > 0){
$scope.isBillToEmpty = false;
}else{
$scope.isBillToEmpty = true;
}
});
$scope.cleanBillTo = function() {
$scope.billTo = "";
$scope.billToID = "";
};
$scope.billTos = [{'ID':$scope.billToID,'VALUE':$scope.initialBillToText}];
$scope.billTo = $scope.billToID;
$scope.getBillTos = function(billToText) {
var promise = BillToService.getBillTos(billToText,
$scope.user.expenServerID);
promise.then(function(billTosInformation) {
$scope.billTos = billTosInformation;
});
$scope.billTos = BillToService.getBillTos(billToText,
$scope.user.expenServerID);
return $scope.billTos;
};
} ]).directive('smartBillTo', function() {
return {
restrict : 'E',
controller : "BillToCtrl",
templateUrl : 'components/directives/billTo/bill-to.html'
}
<table id='AllocationTable' ng-controller='maincontroller' class="table table-hover">
<thead>
<tr>
<th class="text-left">
<input type="checkbox" ng-model="selectedAll" ng-click="checkAll()" />
</th>
<th class="text-center">Charge To Dept
</th>
<th class="text-center">Sub Account
</th>
<th class="text-center">Activity
</th>
<th class="text-center">Category
</th>
<th class="text-center">Bill To
</th>
<th class="text-center">Expense Item
</th>
<th class="text-center">Percentage
</th>
</tr>
</thead>
<tbody>
<tr ng-repeat='data in datalist'>*How can I pass data to <smart-billTo>*
<td class="text-left">
<input type="checkbox" ng-model=''/>
</td>
<td class="text-center"><smart-department ></smart-department></td>
<td class="text-center"><input type='text' ng-model=''/></td>
<td class="text-center"><input type='text' ng-model=''/></td>
<td class="text-center"><input type='text' ng-model=''/></td>
<td class="text-center"><smart-bill-to></smart-bill-to></td>
<td class="text-center"><smart-item ></smart-item></td>
<td class="text-center"><input type='text' ng-model=''/></td>
</tr>
</tbody>
</table>
In the maincontroller I get data from service to init the directive value:
$scope.datalist = Someservice.getdata();
How can I pass data into directives to init the input value (such as bill-to).