| 摘要 |
PURPOSE:To simplify circuit constitution, and smaller in size of an arithmetic processor, by obtaining an output signal, generated as a result of arithmetic processing, in the form of an analog signal through programming. CONSTITUTION:A control signal 2 with time width T1 and a data symbol 3 from an analog-digital converter, etc., are applied to a microcomputer 1. Then, a timer incorporated in the computer 1 sections an arithmetic processing time by periods T and further sections the periods into time areas A and B, and C. At this time, when time length T1 is set longer than period length T, a control signal 2 is applied to the area A in the period T, so the signal is inputted to generate a control input signal with time length T2, thereby processing the symbol 3 in the succeeding area B according to a prescribed program which corresponds to the signal 2. Then, part of the digital signal is D/A-converted in the succeeding area C. Namely, output ports 5 and 6 are changed from a logical level (0) to a logical level (1) on the transition from the area B to the area C, and held at the high logical level (1) throughout the area C. |
