Controlling device, controlled device, and operating method

An operating method applied to a controlled device, the operating method comprising:

• performing, by using a negotiation module, a power negotiation operation with a controlling device via the power pin;
• receiving a programming declaration from the controlling device via the power pin;
• disabling the negotiation module according to the programming declaration;
• receiving a programming data from the controlling device via the power pin after the negotiation module is disabled;
• and
• writing the programming data into a non-volatile memory of the controlled device.

A controlling device comprises:

• a power pin;
• and
• a controller configured for:
• performing, by using a negotiation module, a power negotiation operation with a controlled device via the power pin;
• transmitting a programming declaration to the controlled device via the power pin;
• receiving an allowance of programming from the controlled device via the power pin after transmitting the programming declaration to the controlled device;
• disabling the negotiation module according to the allowance of programming;
• and
• transmitting a programming data to the controlled device via the power pin after the negotiation module is disabled to make the controlled device write the programming data into a non-volatile memory thereof.

A controlled device comprises:

• a non-volatile memory;
• a configuration channel pin;
• and
• a controller configured for:
• receiving a programming declaration from a controlling device via the configuration channel pin;
• receiving a programming data from the controlling device via the configuration channel pin;
• and
• writing the programming data to the non-volatile memory.