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介绍Ｉ~２Ｃ串行总线的基本原理与数据传送格式和具有Ｉ２Ｃ串行总线接口的数控电位器，并据此提出一种抗电磁干扰性能优良的多数字电位器模拟接口控制方案，它具有电路简单可靠、功能完善灵活的特点，适用于微机控制的大功率开关电源的模拟量接口设计．
This paper introduces the basic principle and data transmission format of I ~ 2C serial bus and NC potentiometer with I2C serial bus interface, and proposes a multi-digital potentiometer analog interface control scheme with excellent anti-EMI performance. It has circuit Simple and reliable, fully functional and flexible features, suitable for microcomputer control of high-power switching power supply analog interface design.