A device is provided for supplying microprocessors with electricity, comprising a source for supplying with power microprocessors interconnected by a bus. The source has an initialization output connected directly to a bus so that the microprocessors do not execute their programs during the rise in voltage. Each microprocessor comprises an initialization counter also connected to the bus for recognizing the initialization signal of the source. Each microprocessor also comprises its own initialization generator adapted for detecting an absence of traffic on the bus and for emitting an initialization signal over the bus in the case of "unbuckling" of one of the microprocessors.