Preheat oven to 350 degrees F. Grease cookie sheets. In large bowl with mixer at medium speed, beat together 1 cup of the sugar, butter, pecans and vanilla. With spoon stir in flour. Shape dough into 1-inch balls, flatten slightly. Place on cookie sheets about 1 inch apart. Bake 12 to 15 minutes or until done but not browned. Cool 5 minutes on cookie sheets. In small bowl, mix remaining 1/2 cup sugar and cinnamon. Gently toss each cookie in cinnamon mixture; cool on wire rack.