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ADS127L11: 该芯片进行菊花链连接使用问题

Part Number: ADS127L11
Other Parts Discussed in Thread: ADS127L01

datasheet的8.5.8节的菊花链操作章节,在figure8-36进行了菊花链连接举例。如下图

菊花链模式下,必须将引脚SDO/DRDY配置成“output-only”模式,我打算还是采用硬件的方式捕获“转换数据准备好”的信号,那么请问在菊花链模式下,引脚PIN14_DRDY从哪个ADC中引出来?是从最后一个“ADS127L11(4)”引出DRDY吗?