| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a "data communication unit" for preventing an SDA line from being fixed to an "L" even when any deviation is generated in clocks at a transmission side and reception side due to the mixing of any noise to a clock or the bluntness of waveform. <P>SOLUTION: At the time of transmitting stop conditions to buses 13 and 14, a master 11 monitors whether or not the stop conditions have been able to be detected on the buses, and when the stop conditions have not been able to be detected, the master 11 recognizes that the signal level of the data line 13 is fixed to an "L" by a slave 12, and resets both a data signal and a clock signal to the "L", and then transmits the stop conditions to the buses again. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
