| 摘要 |
PURPOSE:To improve reliability in a data process by adding a parity bit at the time of writing input data in a buffer memory and executing the parity check of the data in the case of reading out the written data. CONSTITUTION:At the time of writing the data in the buffer memory 31 the input data is written in the buffer memory 31 after the parity bit is added to the input data in a parity bit generation circuit 32. And in case of reading out the data from the buffer memory 31, the read data is checked in a parity check circuit 33. Therefore, the parity check is executed to the stage of the buffer memory 31, that is, to the deep part of an input/output controller. Thus, the check level of the normality of the data can be improved.
|
