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TAS2781EVM: PWR_MODE2模式没有信号输出,其他模式信号能正常输出

Part Number: TAS2781EVM

VIN供电5V,PVDDH供电8V,模式选为PWR_MODE2,没有信号输出,选PWR_MODE0就有信号输出,将PVDD_UVLO设为最大,PVDDL选为internal,仍然没有信号输出,请问是否有其他寄存器需要修改?