| 摘要 |
PURPOSE:To increase the number of access words per a unit time with the conventional constitution of a memory matrix, by making it unnecessary to consider a precharge time for a strobe timing signal in case of memory access. CONSTITUTION:When block select signals BLOCK SELECTs of two subordinate bits A7 and A8 in the address assignment shown in figure are logical 0 together, a block BLOCK0 of a memory matrix 1 is selected by a block select decoder 3, and a low address strobe signal is supplied from a strobe generating circuit 4 to a memory element group 2 of the corresponding block on a basis of a strobe timing signal RAS TIMING. Thus, the first memory cycle is started. When the read or write operation in the first memory cycle is terminated, a block BLOCK1 of the memory matrix 1 is selected, and the second memory cycle is started similarly to the first memory cycle. |
