Patent attributes
A nonvolatile storage including a plurality of blocks each serving as one unit in erasing operation and performs a plurality of erasing operations successively, the nonvolatile storage comprising: a volatile memory cell array for storing erase setting information on each block, the information indicating whether or not its associated block is a target to be erased; a write amplifier for writing the erase setting information in the volatile memory cell array; a first readout amplifier for reading out the erase setting information on a target block from the volatile memory cell array upon start of the erasing operation; and a second readout amplifier for reading out the erase setting information on a target block from the volatile memory cell array upon start of readout operation.
