公开(公告)号：JPH1031610A

公开(公告)日：1998-02-03

申请号：JP3063197

申请日：1997-02-14

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： HAKU EISHOKU ,  CHIN SEIJITSU ,  KIN YOKETSU

IPC: G06F12/16 ,  G06F11/00 ,  G06F12/00 ,  G06F12/08 ,  G11C29/00

Abstract: PROBLEM TO BE SOLVED: To perform backup/recovery operation in every block and to attain the locking of a small unit by outputting an address signal and a backup/ recovery control signal to perform a backup process after the data stored in a volatile memory block of a double plane nonvolatile memory means are updated. SOLUTION: An address signal and a backup/recovery control signal are outputted to a double plane nonvolatile memory part 402, and original text data stored in a nonvolatile memory 405 are copied (recovered) to a volatile memory 404 at every part. A data processing part 403 of a database outputs an address read/write control signal and updates the data which are copied to the memory 404. The part 403 also updates the block that is copied to the memory 404 and then outputs both address and backup/recovery control signals to the part 402 to perform the control (backup) so as to overwrite the data of the memory 404 into the memory 405.