摘要:
An information processing device includes a first storage section 2 that includes a plurality of cells to store data; a second storage section 3 that holds refresh intervals and the states of implementation of refresh operations for each of a plurality of the cells; and a control section that controls the refresh operation of each of the cells on the basis of the refresh intervals and the states of implementation of refresh operations held by the second storage section 3. The information processing device controls the refresh operation of each of the cells at refresh intervals set for respective cells.
摘要:
A nonvolatile memory includes a memory cell allay including a plurality of memory cells, each of the memory cells capable of storing electric charges nonvolatilly, a first sense amplifier for comparing a voltage produced by one of the selected memory cells to be read out with a first threshold value for distinguishing between a write state and an erase state of the selected memory cell, a second sense amplifier for comparing the voltage produced by one of the selected memory cell with a second threshold value having a greater voltage than the first threshold voltage, and a write unit for rewriting data of the selected memory cell when the first and the second sense amplifiers produce different sense outputs from each other.
摘要:
A nonvolatile semiconductor storage device includes a plurality of cells for storing data on a basis of charges stored nonvolatilly, a write unit for writing and erasing data on the cell by injecting or extracting charges into or from the cell, a comparator for comparing the voltage produced by a selected cell to be read out with a threshold, a read unit for outputting read data on the basis of the comparison result by the comparator, and a threshold update unit for updating the threshold of the comparator according to the voltage produced by the selected cell.