| 摘要 |
<p>PURPOSE:To attain the exact reception of data even when interrupting data are not used by causing the time constitution of each bit in a data bit, a start bit and a stop bit to be different and causing the time interval of a reader to be longer than the transmitting time of the data. CONSTITUTION:A transmitting side equipment 1 outputs the output signal of a microcomputer 3 from an output port 15 in the form of an open collector and a receiving side equipment 2 pullsup an input signal by a microcomputer power source +VB and after that, the input signal is supplied to an input port 16 of a microcomputer 4. On the other hand, the time TL of the reader is obtained to be enough longer than the transmitting time 21T of the data in a transmitting format. The L level of a following 1T and the L level of the 1T of the reader are the start bit and after that, the data of one bit are outputted with a 2T interval as the H and L level of a data line. After data b0-b7 of eight bits, the 1 level of 3T is added and obtained as the stop bit. Data 1 and 0 are read by the microcomputer 4 in correspondence to the H and L of a signal waveform.</p> |
