Patent ID: 7382680
Filing Date: 2008-06-03
Classification: G11C

Abstract:
1. A semiconductor integrated circuit device comprising: a storage unit arranged on a semiconductor chip to store a plurality of data; and a plurality of registers provided on the semiconductor chip, the registers storing the data transferred from the storage unit, respectively, wherein the storage unit has a nonvolatile memory element section and a volatile memory element section, the nonvolatile memory element section including an address area which stores identification information of the registers as addresses and a data area which stores the data to correspond to the addresses by varying electrical characteristics irreversibly, the volatile memory element section temporarily storing the data read from the nonvolatile memory element section. the volatile memory element section includes a plurality of memory cells and a decoder circuit which selects one of memory cells based on the address, the volatile memory element section storing the data corresponding to the address into the memory cell selected based on the address, and the volatile memory element section rewrites the data, which are read from a data area, and already stored in the memory cells selected on the basis of the addresses, as different data having a same address which are read from a different data area.