摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor memory device for improving security of writing data, and to provide its data writing method.SOLUTION: The semiconductor memory device includes a data latch drive unit for latching and driving data according to a detection starting signal and detection completing signal and transferring the driven data via the first global data bus, a data masking latch drive unit for latching and driving a data masking signal and transferring the driven data masking signal via the second global data bus, an error detection unit for detecting error in the data and data masking signal and generating an error detecting signal, an error detection drive unit for driving the error detecting signal to transfer it via the third global data bus, a writing control unit for generating a write control signal according to the data masking signal and error detecting signal, and a data writing unit for writing array data transferred via the first global data bus into a core circuit according to the write control signal. |