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ADS131E08: 通过SPI发送指令读取的ID错误

Part Number: ADS131E08
Other Parts Discussed in Thread: TMS320C6678,

根据datasheet的说明,我先发送SDATAC指令,随后延时2μs(频率为2MHz),然后发送0x20 0x01(ID寄存器地址为00h),得到如下的波形。

似乎我发送数据之后,ADS131E08并没有任何反应,想请问一下可能是哪里出现了问题?