Timed triggers on a 1-wire rffe bus

A method for timing triggers in a receiving device, comprising:

• generating a base clock signal;
• counting cycles or edges of the base clock signal using a counter of the receiving device while a measurement pulse is received over a one-wire serial bus during a first transaction conducted over the one-wire serial bus, the measurement pulse having a pulse duration defined by a number of clock cycles of a transmitter clock signal;
• and
• adjusting a count value of the counter when the counter is timing actuation of a trigger using a correction value that represents a difference between the cycles or edges of the base clock signal counted while the measurement pulse was being received and the number of clock cycles of the transmitter clock signal that defines the pulse duration.

A system, comprising:

• a host device coupled to a one-wire serial bus;
• and
• a plurality of receiving devices coupled to the one-wire serial bus, each of the plurality of receiving devices including:
• a clock generator circuit configured to generate a base clock signal;
• and
• a counter configured to count cycles or edges of a corresponding base clock signal,
• wherein the host device is configured to:
• initiate a first transaction to be conducted over the one-wire serial bus;
• transmit a broadcast command in the first transaction;
• transmit a measurement pulse in the first transaction and after the broadcast command, the measurement pulse having a pulse duration defined by a number of clock cycles of a transmitter clock signal used by the host device;
• and
• receive measured durations of the measurement pulse from each of the plurality of receiving devices,
• wherein at least one receiving device is configured to use its counter to measure the measurement pulse by counting cycles or edges of its base clock signal while the measurement pulse is transmitted over the one-wire serial bus, and
• wherein the at least one receiving device is further configured to adjust a count value of its counter when the counter is timing actuation of a trigger using a correction value that represents a difference between the cycles or edges of the base clock signal counted while the measurement pulse was being received and the number of clock cycles of the transmitter clock signal used by the host device.