Memory device and method of operating the same

A memory device, comprising:

• a page buffer, including first to third latches, in which original data is stored, during a program operation, for a selected page, and fourth and fifth latches, in which verification data, that varies during a verify operation, is stored,
• wherein the page buffer is configured to:
• transfer the verification data stored in the fourth latch to the fifth latch when a suspend operation is started;
• perform a read operation using the fourth and fifth latches after reconfiguring the original data stored in the first to third latches based on the verification data transferred to the fifth latch;
• restore the verification data to the fourth latch using the data stored in the first to third latches when the read operation is finished;
• and
• resume a normal operation, which had been suspended due to the suspend operation, using the verification data restored to the fourth latch.

A method of operating a memory device, comprising:

• performing a program operation by increasing a threshold voltage of memory cells using original data stored in first latches and by performing a verify operation of the memory cells using second latches;
• suspending the program operation when a suspend command is received during the program operation;
• transferring verification data, stored in the second latches, to the first latches when the program operation is suspended;
• performing a read operation, corresponding to the suspend command, using the second latches;
• restoring the verification data to the second latches using the data stored in the first latches when the read operation is completed;
• and
• resuming the suspended program operation using the restored verification data.