| 摘要 |
PURPOSE:To convert variation of data, detected by many sensors, in detail even when a low-price, slow converter is used by detecting the extent of the variation of the data. CONSTITUTION:When a timer 20 initiates an interrupt to a CPU 10 at specific intervals of time, a flag set in a working area in a RAM 16 is checked to perform A/D conversion 26 as to a sequential channel and a priority channel. Namely, the detailed conversion is performed by increasing the frequency of the A/D conversion for a preferential channel where digital data vary in value according to the extent of the variation of ADD-converted data of respective channels. For the sequential channel where digital data do not vary so much, the frequency of A/D conversion is not increased unlike the preferential channel and speediness which is practically necessary and sufficient is secured. |
