18742941. NAND STORAGE DEVICE (DENSO CORPORATION)

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NAND STORAGE DEVICE

Organization Name

DENSO CORPORATION

Inventor(s)

Tetsuya Kimata of Kariya-city (JP)

NAND STORAGE DEVICE

This abstract first appeared for US patent application 18742941 titled 'NAND STORAGE DEVICE



Original Abstract Submitted

A NAND storage device is provided which includes a built-in controller working to compare a bit error in each block of a first memory area of a NAND memory with a first refresh threshold to determine whether data in the first memory area should be self-refreshed. Similarly, the built-in controller also compares a bit error in each block of a second memory area of the NAND memory with a second refresh threshold to determine whether data in the second memory area should be self-refreshed. This structure is capable of setting the refresh thresholds depending on characteristics of data retained in the NAND memory of the NAND storage device.

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