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您的上电时序是参考datasheet中先给AVDD上电，然后再DVDD吗？
The recommended power-supply sequence is to first have the analog AVDD supply come up, followed by the digital supply DVDD. DVDD can also come up first as long as AVDD ramps to at least 5 V within 50 µs. If neither of these conditions can be satisfied, TI recommends that a software
reset command be issued via the SPI bus after both AVDD and DVDD are stable.
