Apparatus for generating write data and readout data

摘要

An apparatus according to an embodiment comprises a first storage, a second storage, an input unit, a shift number determining unit, and an output unit. The first storage stores identification information of sectors and defective information indicating a presence of defect on the data line, while associating the identification information and the defective information. The second storage has storage regions in a number larger than the first number. The input unit inputs data to the second storage by the first number at a time. The shift number determining unit determines a shift number. The output unit outputs the data stored in the storage regions which is after a head storage region by the shift number, as the data is to be supplied to the data line having no defect sector based upon the defective information, and outputs information that differs from the data to the defective data line.

主权项

1. A data generation apparatus comprising:
a first storage unit that stores identification information and defective information in association with each other, the identification information identifying a plurality of sectors, the sectors being regions including a first number of data lines to each of which a memory cell is connected, the defective information indicating a presence of defect on the data line belonging to the sector identified by the identification information; a second storage unit having storage regions in a number larger than the first number, the storage regions being connected in series; an input unit configured to input one by one the first number of data having been sent from a host device to the second storage unit; a shift number determining unit configured to determine a shift number indicating a value corresponding to the number of the data lines having a defect; and an output unit configured to output write data that is supplied to a sector based upon the defective information corresponding to the identification information of the sector, the write data being output as
the write data to be supplied to a defect-free data line in the sector, the write data being data stored in one of the storage regions and being output one by one starting from a storage region which is after a head storage region by the shift number, andthe write data to be supplied to a defective data line in the sector, the write date being information that differs from the data, wherein, when the second storage unit accepts the first number of the data that is inputted by the input unit, the second storage unit writes the data, which has already been stored in the storage regions, to the storage regions on a head side by the first number, and writes the first number of the data that is inputted by the input unit to each of the first number of storage regions counted from a terminal side.