Preheat oven to 300 degrees. Combine crumbs and margarine; press firmly on bottom of 9-inch springform pan. In large mixer bowl, beat cheese until fluffy. Gradually beat in sweetened condensed milk until smooth. Beat in eggs and vanilla. Toss 1/2 cup chips with flour; stir into cheese mixture.

Pour into prepared pan. Top with remaining chips. Bake 55 minutes or until center is set. Cool. Chill. Refrigerate leftovers.