SEMICONDUCTOR MEMORY DEVICE AND METHOD OF OPERATING THE SAME

Provided herein are a semiconductor memory device and a method of operating the semiconductor memory device, which have an improved processing speed for a suspend operation. The semiconductor memory device includes a memory cell array, a peripheral circuit configured to perform a data operation corresponding to an externally provided command on the memory cell array and a control circuit configured to control the peripheral circuit to perform the data operation by sequentially executing instructions corresponding to a plurality of instruction lines of an operation algorithm for the data operation and, when a suspend command is provided during the data operation, to perform a preset suspend operation in any one of a checker mode and an instant mode.