Apparatus for transmitting data via the I2C bus, method of transmitting data via the I2C bus, and program for transmitting data via the I2C bus

摘要

An apparatus and the like for transmitting data via an I2C bus, which is simple in structure and can yet accumulate data transmitted via the I2C bus, thereby to analyze errors in the I2C bus easily. The apparatus comprises a memory circuit 4 connected to the I2C bus that connects a master 1 and a slave 2. The initial I2C address of the memory circuit 4 is set to the same I2C address as that of the slave 2 in order to write data into the slave 2. The data to be written into the slave 2 is saved in the memory circuit 4, and the I2C address of the memory circuit is set back to the initial I2C address after the data has been written into the slave 2. Thus, the data can be stored in the memory circuit before it is written into the slave and can be read from the memory circuit without influencing the operation of reading data from the slave.