Abstract:
A semiconductor memory device includes a memory cell array, a repair control circuit and a refresh control circuit. The memory cell array includes a plurality of memory cells and a plurality of redundancy memory cells. The repair control circuit receives a repair command and performs a repair operation on a first defective memory cell among the plurality of memory cells during a repair mode. The semiconductor memory device may operate in a repair mode in response to the repair command. The refresh control circuit performs a refresh operation on non-defective ones of the plurality of memory cells during the repair mode.
Abstract:
A semiconductor memory device for performing a disable operation using an anti-fuse, and method thereof are provided. The semiconductor memory device according to an example embodiment includes a fuse circuit including at least one anti-fuse configured to store fuse data, a memory circuit configured to at least one of read data stored in a memory cell and write data to the memory cell and a fuse controller configured to disable a read/write operation of the memory circuit based on the fuse data.
Abstract:
A semiconductor memory device includes a memory cell array, a repair control circuit and a refresh control circuit. The memory cell array includes a plurality of memory cells and a plurality of redundancy memory cells. The repair control circuit receives a repair command and performs a repair operation on a first defective memory cell among the plurality of memory cells during a repair mode. The semiconductor memory device may operate in a repair mode in response to the repair command. The refresh control circuit performs a refresh operation on non-defective ones of the plurality of memory cells during the repair mode.
Abstract:
A method of programming a memory device including a one-time programmable (OTP) cell array configured to include at least one of a protected area and a programmable area are disclosed. The method includes receiving a fuse-program command to initiate a fuse-programming operation; checking whether the programmable area exists in the OTP cell array, terminating the fuse-programming operation when the OTP cell array does not include the programmable area, performing a fuse-programming operation on the programmable area when the OTP cell array includes the programmable area thereby programming fuses to create a fuse-programmed area; setting the fuse-programmed area of the OTP cell array as the protected area.