SEMICONDUCTOR MEMORY DEVICE CAPABLE OF REDUCING POWER CONSUMPTION DURING READ MODE AND STANDBY MODE, ESPECIALLY INCLUDING DATA MEMORY UNIT STORING DATA AND INCLUDING DATA SELECTION CIRCUIT FOR SELECTING INVERTED DATA AND NONINVERTED DATA

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor memory device of which the power consumption at read-out and standby are reduced.;SOLUTION: In this semiconductor memory, the input data of an address of 0 is "00000000" and the number of "0s" is large. The data of the address of 0 therefore is inverted to be "11111111". At the same time, flag information "1" which expresses that inversion is executed is written in the flag bit of the same address of 0. Sine the number of "0s" of the input data of an address of 3 is similarly large, the data is inverted and flag information "1" is written. For input data of addresses of 1, 2, the number of "1s" is larger than the number of "0s", then, data is not inverted and flag information "0" is written. In the written-in data, only data of addresses whose flag signals FLAs are "1s" when the data is read out is inverted again and finally data is read out as data output signals DO0 to DO7.;COPYRIGHT: (C)2005,JPO&NCIPI