| 摘要 |
PURPOSE:To decrease the test time required for complete propriety decision by constituting a memory array dividedly into plural mats and providing a terminal for output observation to each memory mat to access all memory mats at the same time. CONSTITUTION:The memory array 1 is divided into four memory mats 1a-1d where a 16-kbit memory cell is arranged in matrix. A buffer circuit 11 giving an output to an observing pads 13a-13d as observing terminals provided corresponding to the memory mats 1a-1d is provided respectively. In touching a probe to an input pad 13e of a test control signal and impressing a prescribed test control signal, all read/write circuits 8a-8d are activated and all the memory mats are accessed at the same time thereby conducting date read and write. |
