Method and structure for reliable data copy operation for non-volatile memories
AssigneeSanDisk Corporation
InventorsKevin M. Conley, Daniel C. Guterman, Carlos J. Gonzalez
Life of this patent
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Abstract
An improved flash EEPROM memory-based storage subsystem includes one or more flash memory arrays, each with a duplicity of data registers and a controller circuit. When data are read from a flash array into a data register, the data is copied to a second register so that, during the ensuing program operation into the same array, the data may be transferred to the controller for the purpose of checking the data validity. This creates an improved performance system that doesn't suffer data transfer latency during copy operations but that is able to guarantee the validity of the data involved in such operations.
Claims5
A non-volatile memory system comprising:
- an array of non-volatile memory cells;
- a first register;
- a second register;
- and
- a controller circuit for reading data from said array, storing read data into said first and second registers, and simultaneously programming one or more locations of said array with data from said first register while checking the validity of data in said second register.
Dependencies are inferred from the claim text.