| 摘要 |
<p>PURPOSE: To minimize the current and to decrease the dissipation power by switching the number of sense amplifiers, which are operated by changing the data width by the switching of a reading mode, and performing the reading. CONSTITUTION: When the output data width is set at 8 bits by a data-width control signal BYTE, a switching circuit 50 operates only sense amplifiers 51-58 by the first EN1 signal. At this time, sense amplifiers 59-66 are made to be in the non-operating state, and the dissipation power is decreased. When the outer output is 16 bits, all the sense amplifiers 51-66 are operated. Furthermore, when inner reading operation such as verify is performed by an inner-state signal RUN, all the sense amplifiers 51-66 are operated, and the efficient high- speed operation is performed.</p> |
