各位工程师好：
我使用AD2S1210时，目前还没有连接旋转变压器，有如下问题：
1,、与主控芯片进行SPI通信时，读取到数据的D7位一直置高；
2、故障诊断脚DOS LOT 保持低电平，按照手册图37进行上电时序控制（即复位后，将SAMPLE脚由高置低并保持需要的时间再置高，对故障寄存器读取后，再将SAMPLE脚置低、保持后置高）仍不能将它们拉高；
请指导，谢谢各位ADIemployeeanalogchina-admin
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