International Business Machines Corporation

Vipin Patel

Warren Edward Maule

Kyu-hyoun Kim

Charles Arthur Kilmer

Hillery C Hunter

Diyanesh B Chinnakkonda Vidyapoornachary

Stephen P Glancy

Keys are generated at a memory device with a period of time elapsing between generation of each key. A request is received from a memory controller for the most recently generated key. The memory device communicates the first key to the memory controller. Access to nonvolatile memory on the memory device is locked. An unlock command with a second key is received from the memory controller. The memory device determines that the second key matches the first key and unlocks access to the nonvolatile memory in response.

Nonvolatile memory data security

A memory system with a programmable refresh cycle including a memory device that includes a memory array of memory cells and refresh circuitry that is in communication with the memory array and with a memory controller. The refresh circuitry is configured to receive a refresh command from the memory controller and for refreshing a number of the memory cells in the memory device in response to receiving the refresh command. The number of memory cells refreshed in response to receiving the refresh command is programmable.

Memory system with a programmable refresh cycle

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Wappingers Falls, NY, United States of America

Vipin Patel