| 摘要 |
PURPOSE:To suppress the current consumption of a battery by setting the duty ratio corresponding to three stages of modes, communication mode, standby mode and pause mode, transiting the mode to the pause mode when the frequency of call is very less, transmitting the mode into the standby mode when the frequency of call is comparatively less and keeping the mode at the communication mode when the frequency of call is much. CONSTITUTION:The 1st mode is the mode hardly calling a slave set at night or the like and keeps power-on state for 0.1sec in 10min. The 2nd mode is the standby mode and keeps the power-on state for 0.1sec in 2sec. Further, the 3rd mode is the communication mode where communication is enabled normally and the power is kept on at all times. When a control signal commanding the mode change is inputted from a master set 5, a DV (Data Valid) flag goes to L to answer back the completion of preparation of the transition to the mode 2 to the master set 5. Then the 2nd mode is set and transited to the normal communication state. |
