Semiconductor memory device and memory embedded logic LSI

摘要

PROBLEM TO BE SOLVED: To enable the operation of a row/column simultaneous access function with a small number of pins like at a time when addresses are multiplexed. SOLUTION: Whether an address signal is to be outputted to a row decoding circuit 12 or not is selected by a selector 14 and whether the address signal is to be outputted to a column decoding circuit 13 or not is selected by a selector 17. The address signal to be inputted to an external terminal is stored in a latch circuit 15 and, moreover, either the address signal to be inputted to the external terminal or the address signal stored in the latch circuit 15 is selected by a multiplexer 16 to be outputted to either the selector 14 or the selector 7. Then, when a command for simultaneously inputting the address signal to the row decoding circuit 12 and the column decoding circuit 13 is inputted to a command generating circuit 18, the signal stored in the latch 15 is selected in the multiplexer 16 to be outputted and also the sectectors 12, 17 are set to output states.