US Patent 7954042 Check testing of an address decoder

For checking an address decoder of a data memory, from a record of addresses of the data memory, designated as base addresses, one after another each base address is selected, and the following steps are executed for the respectively selected base address:a) determining the content of the base address; andb) selecting an address having the Hamming distance 1 from the base address, designated as the Hamming address; and then:c) changing the content of the Hamming address selected in step b); and then:d) reading the base address and detecting an error of the address decoder if the content read differs from that determined in step a); ande) recovering the content of the Hamming address.