Control unit for in-vehicle ethernet and method for controlling thereof

A control unit within a vehicle which provides an Ethernet, comprising:

• a central processing unit (CPU);
• and
• a physical layer device (PHY) which is connected to the CPU through a first communication and a second communication;
• wherein the physical layer device includes a first pin receiving a power-on signal from exterior and a second pin which can be set as a first mode or a second mode, and when the power-on signal is received at the first pin, the physical layer device initiates a communication by applying a predetermined value based on the mode in the second pin.

A method of controlling a physical layer (PHY) device, comprising steps of:

• receiving a power-on signal from exterior at a first pin;
• determining a mode in a second pin which can be set as a first mode or a second mode;
• and
• initiating a communication by applying a predetermined value based on the mode in the second pin.