ERROR DETECTION DEVICE AND ERROR DETECTION METHOD

摘要

As shown in Fig. 1, an error detection method performs syndrome calculation for object code strings which are inputted in a discontinuous arrangement and makes the object code strings inputted in a discontinuous arrangement skip data so that arrangement of the code strings has continuity, thereby correcting the continuity between data and performing a first error detection code calculation. According to the syndrome obtained in the syndrome calculation, the error data position and the error data value of the object code string are calculated. According to the error data position and the error data value, a second error detection code calculation is performed again only for the error data position among the object code strings. By using the calculation result, the calculation result of the first error detection code calculation is updated so that the ECC processing and the EDC calculation processing which have been inputted in a discontinuous way are simultaneously performed.