SEMICONDUCTOR DEVICE AND METHOD OF OPERATING THE SAME

A semiconductor device and a method of operating the same are provided. The method includes determining whether a read operation on a selected page is a beginning read operation on the selected page; performing a least significant bit (LSB) read operation on the selected page when the read operation is the beginning read operation on the selected page according to a determination result, and performing a first sub-read operation on the selected page according to a result of the LSB read operation; and performing a second sub-read operation including the LSB read operation or a most significant bit (MSB) read operation on the selected page according to stored program state data when the read operation is not the beginning read operation on the selected page according to the determination result.