Sprinkle 1/4 cup of the brown sugar in bottom of 6-quart slow cooker. Place ham, cut-side down, in slow cooker. Pour pineapple chunks with juice around ham.
Mix remaining 3/4 cup brown sugar and spices in small bowl. Coat ham with spice mixture. Cover.
Cook 6 hours on HIGH. Serve ham with pineapple chunks and juice from slow cooker.