Semiconductor memory device, semiconductor system and reading method

A semiconductor memory device, comprising:

• a NAND memory array;
• an input part, inputting an address information, a data, and a specific command which instructs to store a first address information and a first data, wherein the specific command is received from a host device, and comprises the first address information and the first data;
• a reading part, reading the data stored in the NAND memory array based on the address information input from the input part;
• a setting part, storing the first address information in an address storage region of the semiconductor memory device as a specific address information according to the inputted specific command,
• wherein the setting part storing the first data in a hidden data storage region of the semiconductor memory device as a specific data according to the inputted specific command, wherein the first data is not stored in a first address, of the NAND memory array, indicated by the first address information;
• and
• a control part, controlling the reading part, wherein
• the control part, during a reading operation, compares the specific address information with a second address information input from the input part, wherein the reading operation is for reading a second data stored in a second address of the NAND memory array which indicated by the second address information,
• wherein when the second address information and the specific address information are inconsistent, the reading part does not read the specific data from the hidden data storage region, but reads the second data from the second address of the NAND memory array according to the second address information,
• wherein when the second address information and the specific address information are consistent, the control part erases or invalidates the specific address information stored in the address storage region, and the reading part reads the specific data from the hidden data storage region.