Societe D'applications Generales D'electricite Et De Mecanique Sagem

Societe D'applications Generales D'electricite

Sylves Lamiaux

Alex Kuhn

In a process for interconnecting microprocessors, a master microprocessor (1) transmits a character. All the slave microprocessors receive it in a register (4). If processing is in progress in the slave (2) for which it is intended, the character is masked until the processing is finished. After the processing, the slave microprocessor (2) recognizes it, removes it from the register (4) and loads this latter with an echo intended for the master microprocessor (1), allowing it to transmit a new character.

Process for interconnecting microprocessors

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.

Electric power supply device for microprocessors

A microprocessor memory safeguard device comprising a switch having two it terminals and a common terminal. The common terminal is connected to a first terminal of the memory and to the logic zero of the microprocessor. The other input terminal of the switch is connected to one terminal of a battery. The second terminal of the memory is connected to the other terminal of the battery. The second input terminal of the switch is connected to an initialization line of the processor whose initialization input is also connected to the line. The initialization line is connected directly to a power supply source. The initialization line could also be a data bus interconnecting a plurality of microprocessors.

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Yerville, France

Sylves Lamiaux