| 摘要 |
PROBLEM TO BE SOLVED: To prevent a ROM value from being corrupted even when the stability of a clock being used is not secured.SOLUTION: A semiconductor memory device comprises: first storage means from which data is read according to a read address corresponding to a first clock; second storage means to which the data read from the first storage means according to a write address corresponding to the first clock is written and from which the data written according to a read address corresponding to a second clock is read; and address generation means that confirms the stabilization of the first clock, fixes the read address of the first storage means to a fixed value when the first clock is not stabilized, generates the read address corresponding to the first clock to the first storage means when the first clock is stabilized, and generates the write address corresponding to the first clock to the second storage means. |
