| 摘要 |
PURPOSE:To increase the degree of freedoms of a logic design by controlling a switch circuit inserted between a column selector, a sense amplifier of a memory circuit contained in a master slice type LSI and a light amplifier by a control circuit prepared in advance in the memory circuit. CONSTITUTION:When a seventh address 39 is 0 level, switch circuits 34, 36 are conductive and switches 35, 37 are interrupted. Accordingly, the data of a first memory cell array 2 selected by first-sixth address inputs 12-17 are applied to the input of a sense amplifier 18 at the time of reading. A signal applied to a data input terminal 30 is written in memory cells selected by the inputs 12-17 of the array 2 at the time or writing. Similarly, the memory cells selected by the inputs 12-17 of a memory cell array 4 are accessed from terminals 28, 31. When seventh address input 39 is '1', the switches 35, 37 become conductive, and the arrays 3, 5 can be respectively accessed from terminals 26, 30 and 28, 32. |
