Memory controller and control method thereof

A program control method of a memory controller for controlling a memory device comprising a plurality of memory pages respectively connected to a plurality of word lines, the program control method comprising:

• receiving a request for a data operation with a higher priority from an external host during a program operation on a selected memory page of the plurality of memory pages connected to a selected word line of the plurality of word lines of the memory device;
• transmitting a suspend command to the memory device, responsive to the receiving the request for the data operation with the higher priority;
• receiving, from the memory device, a signal indicating that the program operation has been suspended, responsive to the transmitting the suspend command;
• transmitting, to the memory device, a command corresponding to the request for the data operation with the higher priority;
• transmitting a resume command to the memory device such that the memory device resumes the program operation after completion of the data operation with the higher priority;
• and
• storing suspend flag information indicating that the selected memory page has undergone a suspend operation and suspend operation information of the selected memory page.

A memory controller for controlling a memory device comprising a plurality of memory pages respectively connected to a plurality of word lines, the memory controller comprising:

• a processor;
• and
• an internal memory configured to store suspend flag information that indicates whether a suspend operation has been performed, suspend operation information for each memory page of the plurality of memory pages, and matching information of a read offset level corresponding to the suspend operation information,
• wherein the processor is configured to control the memory controller to transmit a read command signal to the memory device based on the suspend operation information and the read offset level of a selected memory page connected to a selected word line of the plurality of word lines, responsive to identifying that the selected memory page has undergone a suspend operation based on the suspend flag information of the selected memory page, and responsive to a read request received from an external host for the memory controller, and
• wherein the suspend operation information and the read offset level are stored in the internal memory.