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DAC8771电压量程问题

Other Parts Discussed in Thread: DAC8771

1)在0-5V(默认)调节输出的时候,可以正常控制电压大小

2)当我改变寄存器0x04的【0:3】写进9,量程是0-10V,结果输出的最大值还是5V,也就是量程没有改变

3)上面的值我也读出来了,也是9,表示我软件修改成功

4)请问一下DAC8771怎么修改量程?