METHOD AND DEVICE FOR COMMUNICATING BETWEEN ONE MASTER AND SEVERAL SLAVES FOLLOWING A SERIAL COMMUNICATION PROTOCOL, ESPECIALLY OF THE OPEN DRAIN TYPE

摘要

According to one embodiment, the identifier bits of the slaves are recursively tested in groups of p bits. For these p bits, each slave will recognize in its corresponding p bits of identifier, a combination of the 2 possible. The slaves respond simultaneously (20) on the bus, for example an I C bus, to a request from the master. The response is made by outputting a sequence of "1" in which each slave interposes a "0", which is for example the priority logic value on the bus, the position of the "0" in the sequence of "1" being a function of the binary value of the combination recognized by the slave in the p-bit group of its identifier. The master gradually determines (22) from the bits of the received frame the bit values of this digital information.