22. The method of claim 21 further comprising: reading the modified digital word from the memory using an error correction process to obtain a recovered initial digital word; reading the modified digital word from the memory with the error correction process disabled to obtain a recovered modified digital word; and comparing the recovered initial digital word and the recovered modified digital word.
27. The method of claim 22 wherein comparing the recovered initial digital word and the recovered modified digital word comprises determining the location of the modified bit relative to other bits of the modified digital word.