US 2007/0192664 A1 · Semiconductor memory

Abstract

A conversion control unit sets a converting function of a write data conversion unit or a read data conversion unit enabled or disabled for each controller. Accordingly, for a controller which needs original external data, the external data can be inputted and outputted, whereas for a controller which needs converted internal data, the internal data can be inputted and outputted. A data converting function of a conventional controller can be realized in a semiconductor memory, which can reduce the load on the controller. As a result, the performance of a system can be improved. A disabled controller which has no access right cannot read correct data (original data before conversion). Hence, the security of data written into the semiconductor memory can be protected.

Claims18

Dependent claims

A semiconductor memory, comprising:

a write data conversion unit which converts external data supplied from outside into internal data;
a memory sell array which includes a memory cell storing the internal data;
a read data conversion unit which converts the internal data read from said memory cell array into the original external data;
and;
a conversion control unit which sets enabled/disabled a function of one of said write data conversion unit and said read data conversion unit for each of controllers inputting or outputting data to or from said memory cell array.

2 more elements

Dependencies are inferred from the claim text.

Semiconductor memory

Life of this patent

Semiconductor memory

Life of this patent

Abstract

Claims18