| 摘要 |
PURPOSE:To improve the entire communication efficiency by using a high speed serial clock in the communication between high speed CPUs and switching the serial clock into a low speed When the low speed CPU participates in the communication. CONSTITUTION:In the usual state of communication between a 1st communication equipment and a 2nd communication equipment, the 1st communication equipment outputs a high speed serial clock. When a communication participation signal is inputted from the 3rd communication equipment, the 1st communication equipment replies it to output a low speed serial clock. Thus, in the communication between the high speed communication equipments, since a high speed serial clock is used, the high speed communication is attained. Even if the low speed communication equipment participates in the low speed communication equipment, since the serial clock is switched to a low speed, the low speed operating communication equipment can communicate with other communication equipment. |
