| 摘要 |
PURPOSE:To prevent the transmission of sound data with contact by using a microprocessor which can supply the generation address of a control memory and a memory which stores the upper and lower limit levels of continuous addresses for each data of a main memory. CONSTITUTION:The upper and lower limit addresses of a time slot are stored in a memory RAM, and an adder ADD is actuated. In this case, the address obtained before addition is also applied to a microprocessor MPU. Then it is judged whether the read-out control address is set correctly within a data store region. When said address is set correctly within said region, no output is generated from the MPU. Then selectors ASL and DSL apply the outputs of a counter CNT and the adder ADD. The upper limit address of a region is designated as a result of decision even in case the data regions have no equal size to each other, and the upper limit value of the RAM is delivered to the selector. In such a way, the memory data can be transmitted regardless of the quantity of data to be converted into sounds. This prevents that the data of other regions are mistakenly transmitted. |
