Electronic control unit (ECU) mounted in vehicle, has fist MSB controller that waits for transmission of command frames during transmission of data frames, and transmits command frame after transmission of data frames is completed

摘要

The ECU (1) has a first micro second bus (MSB) controller (15) that transmits a data frame representing control signal from a second MSB controller (21). The first MSB controller transmits a command frame according to transmission instruction to second MSB controller. The first MSB controller determines whether data frame is transmitted when the command frame generates transfer instruction. The fist MSB controller waits for transmission of command frames during transmission of data frames, and transmits command frame after transmission of the data frames is completed.