The 89C52 chip was adopted by system MCU. The 89C52 chip was connected with SCL and SDA in FM31526 through pins. And the I2C bus protocol was also adopted to realize the data exchange between single chip and FM31256.

• 系统MCU采用89C52芯片,而89C52芯片分别与FM31256的SCL和SDA引脚相连,并以I2C总线协议实现单片机与FM31256间的数据交换。