| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of writing errors in a write and autoprecharge mode, while increasing the speed of the operations and the clock frequency. SOLUTION: When a write and autoprecharge command is fetched, a CPSRX and an AUTPL become 'H'. When a column operation is completed, the CPSRX becomes 'L'. When the CPSRX='L' and the AUTPL='H', and a CSLCK='H' holds, an autoprecharge enable signal AUTPE becomes 'H'. When the CSLCK is 'H', AUTPE becomes 'H', and AUTPE with not depend on the leading edge of an external clock VCLK. Since the autoprecharge takes place, when a column select line CSL is put in an active state, the falling time of a word line will not depend on the external clock frequency and is always made a constant. |
