| 摘要 |
A data input/output circuit includes a rank selecting section and a data input/output section. The rank selecting section is selectively connected to one of the first and second ranks in response to a chip selection signal, and outputs data to a connected rank or receives data from the connected rank. The data input/output section outputs the data transmitted from the rank selecting section through a data pad to an external device during a read operation, and outputs the data inputted to the data pad to the rank selecting section during a write operation.
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