The present invention relates to a circuit of reception of bits transmitted on an asynchronous signal, including a circuit for providing a clock reconstructed from the asynchronous signal, this clock being used to sample the asynchronous signal to form a synchronous output signal, and a reception error detection circuit. The reception error detection circuit includes an edge detector providing a detection pulse for each edge of predetermined direction of the asynchronous signal; and an alarm circuit activating an alarm signal when an edge of predetermined direction of the synchronous signal occurs outside a detection pulse.