Patent ID: 7958438

Claim:
An electric control unit adapted to coupling with a Controller Area Network comprising: a central processing unit; and a network interface unit comprising a protocol processing unit, a message processing unit, and a register, wherein in a first mode, the network interface unit is to receive a message from the Controller Area Network or is to send a message to the Controller Area Network in response with a control signal from the central processing unit, wherein the protocol processing unit interprets a received message and generates a sending message in accordance with a data set in the register, wherein the message processing unit controls priority of messages, and wherein in a second mode, the protocol processing unit incorporates a first message into the received message or a second message into the sending message in accordance with the data set in the register, and the register includes a first bit field for indicating the first mode or the second mode, a second bit field for specifying to incorporate the first message into the received message or the second message into the sending message.