• 使用FM收音芯片Si4736,在软件调试中IIC通讯不正常,应如何解决?

  • 创建于2016-03-30

1个回答

  • _世强 (0)

    一、测整板供电正常3.3V,SEN引脚接地,PGIO1和GPIO2悬空(选择IIC模式GPIO1接电源,GPIO2接地,芯片内部默认将这两个引脚做了这样的配置,所以只需要悬空就可以选择IIC通讯)。读取IIC写入数据,发现IIC的响应NAK,即IIC无响应;二、检查PCB发现IIC的上拉电阻被断开。将IIC通过10k电阻上拉到3.3V后通讯正常,问题解决。

    创建于2016-03-30

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