| 摘要 |
PURPOSE:To simplify the layout of a data input/output part between select and sense amplifying circuits and an external circuit and to reduce the chip area. CONSTITUTION:1st and 2nd select and sense amplifying circuits SSA11-SSA17, and SSA21 and SSA22 are provided with input/output switching circuits IOS 1-IOS9 one to one. Those input/output switching circuits IOS1-IOS9 and data buses DB11, DB12-DB41, and DB42 are so connected that the number of memory cell arrays which can be connected to those data bus becomes equal. |
