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AMC60804T: IDAC输出异常

Part Number: AMC60804T

使用AMC60804T IDAC功能,IDAC1和IDAC2连接在一起做输出,IDAC3和IDAC4连接在一起做输出,按照8.3 Initialization Setup后,当给IDAC 0x44赋值后,实际的输出电流按照最大值输出,改动寄存器值,实际输出不改变,请问有什么关键寄存器改动吗?目前0x13 是0x06FF;DAC:0x40 是0x0007;ADC:0x40 是0x3336其他为初始值.