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用STM32的SPI直接向DAC8501写数据，没有电压输出，有的时候会偶尔有输出，单片机CLK接8501的SCLK，单片机MOSI接8501的DIN口，CPOL为低0，CPHA为1，数据无输出，请问什么原因？
有没有电路，以及你配置寄存器的流程？
