Data in-out put circuit with verification for data inversion and semiconductor memory device having the same
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The semiconductor memory device including the data input-output circuits and it has a data inverting function check is posted. Data input and output circuit of the present invention inverts in accordance with the input mode, the input data group input inversion flag is transmitted to the memory cell array. Then, the data input is sent when the data group outputted from the memory cell array in the output mode corresponding to the predetermined reversal conditions, by inverting the data group in which the output to the outside. At this time, the data group is output inverted output flag to indicate that the reverse is generated. Then, the data input circuit is storing the input inversion flag from the input mode to the memory cell array, comparing the inverted input and the output flag inversion flag stored in the memory cell array in the output mode. According to the semiconductor memory device including the data input and output circuit of the present invention and this, it is easy to determine whether to perform the normal data inversion function. Data, inverted, check the flag, the semiconductor memory