| 摘要 |
PURPOSE: A method for securing a reliability of an I2C(Inter-Integrated Circuit) communication is provided to prevent a variable on an analogue from influencing to an MCU of a digital unit and other IC. CONSTITUTION: If a power is turned on(200), an MCU, an X-TAL oscillator, and other IC are operated(210). A stop condition(250) is appended before an I2C communication, and the MCU and the IC which are unstable states by the stop condition(250) are restarted regardless of states of an I2C line or the MCU, and a chip address and data are transmitted(230,240) by a start condition(220) at a fixed condition in each time. In addition, a signal is terminated by the stop condition(250). Thus, a reliability of an I2C communication is secured.
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