Patent ID: 8724682

Claim:
A method for performing bidirectional communications between a first electronic unit and at least one second electronic unit, comprising: transmitting from the first electronic unit to the at least second electronic unit a clock signal and an input signal synchronized with the clock signal; in response to the input signal, transmitting from the second electronic unit to the first electronic unit a response sequence in an output signal; generating and transmitting an unambiguous test sequence from the second electronic unit to the first electronic unit prior to the response sequence in the output signal, wherein a time sequence between the test sequence and the response sequence in the output signal makes it possible to take into account a time delay between the first electronic unit and the at least one second electronic unit; wherein the test sequence in the output signal is detected by the first electronic unit, and the response sequence in the output signal is recognized based on the detection of the test sequence, and wherein the output signal received in the first electronic unit is sampled using a multiple of the clock pulse.