Card controller controlling semiconductor memory including...

Details Card controller controlling semiconductor memory including... Card controller controlling semiconductor memory including...

2011-08-30

2011-08-30

Dinh, Son T (Department: 2824)

Static information storage and retrieval

Addressing

Plural blocks or banks

C365S189070, C365S236000, C365S185240

Reexamination Certificate

active

08009503

ABSTRACT:
A card controller includes an arithmetic processing device. The controller writes data to a semiconductor memory having a first memory block and a second memory block each including a plurality of nonvolatile memory cells each configured to hold at least 2 bits, data in the first memory block and data in the second memory block being each erased at a time. The arithmetic processing device writes the data to the memory cells in the first memory block using an upper bit and a lower bit of the at least 2 bits and writes the data to the memory cells in the second memory block using only the lower bit of the at least 2 bits.

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