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TLV5638掉电后无法配置成功

Other Parts Discussed in Thread: TLV5638

使用FPGA主控 SPI控制,上电对TLV初始化配置为内部参考电压,正常工作。对整个设备突然切断电源,再重启,程序开始对TLV5638进行配置,发现没有正常配置为内部参考,测了一下参考管教为0.26V,对这个管教加电才能正常工作,不明白为什么会这样,同一个程序,掉电后重启,无法配置成功