Arrangement comprising electronic devices exchanging information

In a transmission system in which information is transmitted from a first device (2) to a second device (6) and vice versa, use is made of a first part (t0-t3) of a timeslot to transmit data from the first device (2) to the second device (6) and of a second part (t3-t4) of the timeslot to transmit data from the second device (6) to the first device (2). To obtain correct operation of the system, the second device (6) is synchronized to the first device (2). This is done using a phase locked loop (78) which locks on the signal present on the interconnection lines between the first device (2) and the second device (6). To ensure reliable synchronization, the second part of the timeslot (t3-t4) ends before the beginning (t5) of the first part of the next timeslot; and a rising edge is presented at the beginning (t5) of the first part of each new timeslot.