| 摘要 |
PURPOSE:To simplify a reception monitor means of a signal, by switching and setting a polarity data corresponding to the state to be monitored out of the start and end states of communication for an indicating means indicating the polarity of the signal to be monitored. CONSTITUTION:When a start signal ST of a reception signal R is risen at a time t0, an output of an EOR circuit 2 goes to ''0''. Thus, a counter 7 is started with a timing pulse P. A discrimination section 6 compares a specified value G with a count value H of the counter 7, and when they are coincident, ''1'' is set to a bit (e) of a register 11. Thus, a processor 12 is interrupted, and the incoming of a signal ST is informed to the processor 2. After a data (d) succeeding to the ST is converted into a parallel data at a serial parallel conversion section 10, the data is stored in a memory 13 via a data bus D. |
