Back to results
US 9,431,076 B2Granted
Memory system, semiconductor device and methods of operating the same
AssigneeSK hynix Inc.
InventorJee Yul Kim
Life of this patent
Estimating the term…
Abstract
A memory system, a semiconductor memory device and methods of operating the same may perform a read operation on the basis of flag data stored in a flag register, without reading the flag data stored in a memory array, when performing the read operation, so that a time taken for the read operation may be reduced.
Claims16
A method of operating a memory system, the method comprising:
- storing a flag data, read from one memory block among a plurality of memory blocks, in a random-access memory (RAM) outside a semiconductor memory device;
- storing the flag data, read from the RAM, in a flag register in the semiconductor memory device;
- and
- performing a read operation on memory cells of a selected page in response to a page address on the basis of the flag data stored in the flag register,
- wherein the flag data is used for determining a read voltage for the read operation, and
- wherein the one memory block includes the flag data for each word line of the plurality of memory blocks.
3 more elements
Checking whether flag data read from one memory block among a plurality of memory blocks for each word line is stored in a flag register of a semiconductor memory device;
- performing, at the semiconductor memory device, a most (MSB) page read operation on a selected word line using a controller configured to control operations of the semiconductor memory device when the flag data is not stored in the flag register;
- storing flag data, determined by the MSB page read operation, in the flag register;
- and
- performing a least significant bit (LSB) page read operation on the selected word line on the basis of the flag data of the selected word line stored in the flag register,
- wherein the one memory block includes the flag data for each word line of the plurality of memory blocks.
2 more elements
A memory system, comprising:
- a random access memory (RAM);
- a semiconductor memory device, wherein the semiconductor memory device comprises:
- a memory array including a plurality of memory blocks;
- a peripheral circuit configured to read a flag data of the plurality of memory blocks and outputting the flag data to the RAM;
- and
- a flag register configured to store the flag data;
- and
- a controller configured to generate a read command and a page address and controlling the RAM to store the flag data and allow the flag register to store the flag data stored in the RAM,
- wherein the peripheral circuit of the semiconductor memory device is configured to perform a read operation on memory cells of a selected page in response to the read command and the page address, on the basis of the flag data stored in the flag register, and
- one memory block among the plurality of memory blocks stores the flag data of each word line of the plurality of memory blocks.
7 more elements
Dependencies are inferred from the claim text.