Error detection in stored data values

摘要

An apparatus has a plurality of storage units. A parity generator is configured to generate a parity value in dependence on the respective values stored in the plurality of storage units. The parity generator is configured such that determination of the parity value is independent of a read access to the data stored the plurality of storage units. A detector is configured to detect a change in value of the parity value.

主权项

1. An apparatus comprising:
a plurality of storage units configured to receive data including a first storage unit and one or more other storage units, wherein the plurality of storage units are configured to output the data in response to a read access; and a plurality of parity logic units associated with each of said one or more other storage units, wherein each of said plurality of parity logic units is configured to:
receive at a first input plurality of inputs a respective value from a corresponding storage unit of said one or more other storage units;receive at a second input a respective value from the first storage unit or a previous storage unit of said one or more other storage units;determine a parity value from said first and second inputs; andoutput said parity value, said apparatus further comprising: a detector configured to receive said parity value from a last storage unit of said one or more other storage units and detect a change in said parity value.