| 摘要 |
PURPOSE:To write quickly many same data, by making all chip selecting signals active independently of a part of an address by a decoder decoding a part of the address to the chip selecting signal. CONSTITUTION:A decoder 2A makes sequentially the chip selecting signals S10 S13 active in response to the input of a part of the address, and data are written sequentially in corresponding memory elements M1-M4. On the other hand, in setting an FF3 and applying a high level Q output to the decoder 2A, the decoder 2A makes all of the signals S10 S13 active independently of a part of the address, the same data are written in the memories M1-M4 at the same time, and the write of many same data is attained quickly. |
