Abstract: A device control protocol (and related implementation) is provided to control power ICs and other devices. For this protocol, a master device communicates with a slave device using a single wire. The device control protocol distinguishes between different types of information (such as register address information and register content information) by defining one or more boundary values. For one example, register content information is defined to be less than or equal to n. Register address information is defined to be more than n. To store data into a register of a slave device, a master device sends the register address using more than n rising edges of the EN/SET signal. The master device then sends the register contents using n or less rising edges of the EN/SET signal. The slave device decodes the address information, selects the corresponding register and stores the register contents.

Abstract: A device control protocol (and related implementation) is provided to control power ICs and other devices. For this protocol, a master device communicates with a slave device using a single-wire. The device control protocol distinguishes between different types of information (such as register address information and register content information) by defining one or more boundary values. For one example, register content information is defined to be less than or equal to n. Register address information is defined to be more than n. To store data into a register of a slave device, a master device sends the register address using more than n rising edges of the EN/SET signal. The master device then sends the register contents using n or less rising edges of the EN/SET signal. The slave device decodes the address information, selects the corresponding register and stores the register contents.

Abstract: A two-wire apparatus for controlling AC power to a load, by turning a thyristor on and off during each half cycle, includes a circuit that prevents the thyristor from being turned off prematurely. The circuit stores energy while the thyristor is off (i.e., non-conductive). After the thyristor turns on, the stored energy flows to the gate of the thyristor to keep it on until the end of the half cycle. The circuit permits reduced electromagnetic interference and increased load power rating; without requiring a third (neutral) wire for the apparatus.