测试发现VREF存在2.2电压 PWRUP WAKEUP给高电平3.3v VGPOS VSPOS VSNEG VGNEG 均无电压 IIC通信正常 猜测DCDC的工作条件不满足 希望得到解答
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datasheet上有典型电路,你可以根据需求做适当修改。
对于上电信息,你可以结合datasheet第三页的时序给与电压。