PURPOSE:To realize a data take-in system with which the data loss can be solved in an extremely effective way. CONSTITUTION:The sample-held input data is converted into the digital signal through A/D converter and then transmitted to multiplexer MPX to be controlled by control signal 9. And the data is distributed to memory M1 and M2 according the level of signal 9 and then sent to central process unit CPU via gate G2 and G3 and under the control of signal 8a and 8b. The data take-in time of memory M1 and M2 in CPU is decided by the data setup information which repeats ''1'' and ''O'' with period Ta. Accordingly, the previous data setup information is taken in previously to secure the exclusive logical sum (EOR) between the new and the previous data setup information when the new information is taken in. And when the result becomes ''1'', CPU takes in the data by deciding that the data has been set up.
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