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ADS1146 配置 SYS0寄存器为 0x19,读取数据一直0x7fff

Other Parts Discussed in Thread: ADS1146

在使用ADS1146时,仅配置 SYS0寄存器,配置为0x19,然后读取次寄存器,也是0x19.启动连续转换,等待转换完成,读取数据。读取到的数据一直是0x7fff。实际万用表测量输入引脚电压为1.67V,基准电压为2.49V。如果配置寄存器 MUX1为 0x02 时,读取到的数据转换成电压为 2.49V。再次将 MUX1配置为 0 时,读取到的数据依然是0x7fff.