| 摘要 |
PURPOSE:To execute a required inspection in a using field without providing an inspecting signal generator on the external by substituting inspecting program data obtained from an external ROM for internal program data in a logic array. CONSTITUTION:At the time of inspecting a system mounting a logic cell array(LCA), programming information for determining the internal constitution from the ROM 3 to the LCA 2 is substituted for inspecting programming information. When the inspecting programming information is applied, an 8-bit specific pattern generator 26, a 13-bit address counter 27, three-state buffers 23, 24, and a timing adjusting logic part 25 are constituted in the LCA 2. In addition, the LCA 2 is provided with specific terminals capable of individually inputting a counter enable signal CEL 1, a clear signal CLR 1 and a clock signal from a timing generator on the reproducing side. Thereby, a logic part 25 and buffers 23, 24 are used in common with a reproducing mode. |
