Method for adjusting a timing signal (18, 218) of a transmitting/receiving circuit (16, 216) for asynchronous data, the transmitting/receiving circuit (16, 216) being included in a control device (6, 206) of a home automation actuator, the control device (6, 206) comprising generating means (20, 220) for generating the timing signal (18, 218) from a first clock signal (14, 214) and receiving means (22, 222) for receiving a second clock signal (24, 224), characterised in that the first clock signal (14, 214) has a frequency value from among a plurality of predetermined frequency values, and in that the method comprises: - a determination step for determining a theoretical number of periods (NP_ATT) of the first clock signal (14, 214) to be counted during a duration of a predefined number of periods (NP_DEF) of the second clock signal (24, 224), where, during the duration of the predefined number of periods of the second clock signal, a single theoretical number of periods of the first clock signal is expected for each predetermined frequency value of the first clock signal, the determination step comprising a selection sub-step for selecting the theoretical number of periods (NP _ATT) from among a plurality of predetermined numbers, this selection being carried out as a function of a parameter relating to the value of the frequency of the first clock signal (14, 214); - a counting step for counting an effective number of periods (NP_EFF) of the first clock signal (14, 214) during the duration of the predefined number of periods (NP_DEF) of the second clock signal (24, 224); - an adjustment step for adjusting the frequency of the timing signal (18, 218) by the generating means (20, 220) as a function of the effective number of periods (NP_EFF) counted and of the theoretical number of periods (NP_ATT) selected, such that the timing signal (18, 218) has a substantially constant frequency whatever the value of the frequency of the first clock signal (14, 214). - a determination step for determining a theoretical number of periods (NP_ATT) of the first clock signal (14, 214) to be counted during a duration of a predefined number of periods (NP_DEF) of the second clock signal (24, 224), where, during the duration of the predefined number of periods of the second clock signal, a single theoretical number of periods of the first clock signal is expected for each predetermined frequency value of the first clock signal, the determination step comprising a selection sub-step for selecting the theoretical number of periods (NP _ATT) from among a plurality of predetermined numbers, this selection being carried out as a function of a parameter relating to the value of the frequency of the first clock signal (14, 214); - a counting step for counting an effective number of periods (NP_EFF) of the first clock signal (14, 214) during the duration of the predefined number of periods (NP_DEF) of the second clock signal (24, 224); - an adjustment step for adjusting the frequency of the timing signal (18, 218) by the generating means (20, 220) as a function of the effective number of periods (NP_EFF) counted and of the theoretical number of periods (NP_ATT) selected, such that the timing signal (18, 218) has a substantially constant frequency whatever the value of the frequency of the first clock signal (14, 214).