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ADS131A04的上电READY WORD问题, 一直读取相同的数据,请看下什么问题

Other Parts Discussed in Thread: ADS131A04

ADS131A04配置成 不使用HAMMING DATA, 16位DEVICE WORD 和 CONVERSION DATA,

根据PDF上电后, 应该能读取一个0xFF04的上电值,但是怎么调都不能返回这个值, 且不能unlock device, 麻烦看下是哪方面原因?