Single-wire communications using iterative baud learning

A method comprising:

• detecting transitions on a single-wire bus that are produced by a host device;
• determining an estimated baud rate of the host device based on the transitions, wherein determining the estimated baud rate comprises charging a capacitor based on a charging rate in response to a detection of a first transition of the transitions, sampling a capacitor voltage associated with the capacitor in response to a detection of a second transition of the transitions, and adjusting the charging rate based on a comparison between the capacitor voltage and a reference voltage;
• and
• communicating with the host device based on the estimated baud rate.

A system comprising:

• a host device;
• and
• a slave device coupled with the host device via a single-wire bus, wherein the slave device is configured to perform operations comprising:
• detecting transitions on the single-wire bus that are produced by the host device,
• determining an estimated baud rate of the host device based on the transitions, wherein determining the estimated baud rate comprises charging a capacitor based on a charging rate in response to a detection of a first transition of the transitions, sampling a capacitor voltage associated with the capacitor in response to a detection of a second transition of the transitions, and adjusting the charging rate based on a comparison between the capacitor voltage and a reference voltage, and
• communicating with the host device based on the estimated baud rate.