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SM72442 iic通讯异常

Other Parts Discussed in Thread: SM72442

我们通过MCU与SM72442进行iic通讯时:SM72442出现不回复ACK信号的情况。

我们测试过程如下:MCU先发送start信号,然后发送02h(SM72442地址 + 写指令),SM72442可以正确回复ACK信号;但当MCU继续发送E0(reg0 地址),SM72442却不回复ACK信号。

我们测试波形见下图,