| 摘要 |
PURPOSE:To make it unnecessary to supply electric power at the queuing time of a system control part to reduce power consumption, by performing communication between the system control part and the external through busses. CONSTITUTION:When accepting transmission signal, network control part 2 sends an automatic power supply signal to the FF of the automatic power supply circuit in operation board control part 4, and the FF latches this signal when receiving it, and the system power source control signal of the output is turned on, and power source 1 supplies system electric power to respective circuits. At this time, system control part 3 becomes the operatable state to control the whole of the system. Consequently, it is unnecessary to supply queuing electric power to system control part 3, and power consumption at the queuing time is reduced. Then, control part 3 can utilize the rise of the system electric power to generate the reset signal, which initializes the internal, when system electric power is supplied, and simultaneously, control part 3 can initialize other circuits similarly by sending the same reset signal to them. |
