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做测试的时候发现F28377S的DA输出使用的AD的接口，那另外的DAC1/DAC2/DAC3/DAC4是做什么用，查了LAUNCHPAD的电路图，上面是与PWM相连，可是PWM触发DAC不是内部链接吗？
F2837X DAC输出是和ADC管脚复用的，你可以查看Datasheet里面的管脚分配，LAUNCHPAD的电路图 上的DAC1/DAC2/DAC3/DAC4 是用PWM输出经过RC 滤波后模拟DAC输出功能。
