ad5755的通道A电压输出一直为0如何解决呢？

ad5755的通道A电压输出一直为0，回读状态寄存器，为0x1800，D12位“1”，说明通道A的DC-DC转换器无法调节至期望的15V。
回读各个寄存器，数据都正确，VboostA输出为5V。
请教，该问题是怎么回事，硬件问题还是软件问题，如何解决呢？说是DC-DC晶振的问题，请问该怎么检测？
//硬件复位   
     ad5755_RESET_0 = 1;
     delay(10);
     ad5755_RESET_0 = 0;
     delay(10);
     ad5755_RESET_0 = 1;
   
     SPI_data_rev[0] = 0;
     SPI_data_rev[1] = 0;
     SPI_data_rev[2] = 0;
     SPI_data_rev[3] = 0;
//编程寄存器   
     SPI_data = 0x5c6005;   //DC-DC控制寄存器,0b0101_1100__0110_0000_0000_0101;
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x5c2200;   //主控制寄存器;poc=0,电压未使能，输出为POC硬件值;无状态回读;无看门狗;
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x5c4191;   //DAC A控制寄存器,0b0101_1100__0100_0001_1111_0001;外部RSET电阻; 输出0~10V
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x48ffff;   //DAC A增益寄存器,0b0100_1000__0xffff
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x50ffff;   //DAC A失调寄存器,0b0101_0000__0xffff
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x585a54;   //DAC A清零代码寄存器,0b0101_1000__0101_1010_0101_1010
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x5c002b;   //DAC A压摆率控制寄存器,0b0101_1100__0000_0000_0010_1011
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x5c9000;   //软件寄存器,映射D11为’1‘
     SPI1_Send_Rev_Byte_3(SPI_data);
     SPI_data = 0x40000f;   //DAC A数据寄存器,0b0100_0000__0x0000
     SPI1_Send_Rev_Byte_3(SPI_data);
     delay(200);
     SPI_data = 0x5c41d1;   //DAC A控制寄存器,0b0101_1100__0100_0001_1111_0001; 输出使能0~10V
     SPI1_Send_Rev_Byte_3(SPI_data);