UFS device for transmitting status information through AFC frame and operating method thereof

A memory system comprising,

• a memory device storing data;
• and
• a memory controller configured to:
• determine status information of the memory system,
• generate a frame used for a flow control at a data link layer between a host and the memory system, and including a sequence number for data received by the memory system and the status information, and
• transmit the frame to the host while the host is performing communication with the memory system through the data link layer,
• wherein the memory controller is configured to generate the frame by:
• writing the status information of the memory system to at least one status information register included in the memory system by executing an interrupt service routine for processing interrupt indicating a change of the status information, and
• storing, in the frame, the status information of the memory written in the status information registers.