STC15W204S单片机AD采样程序，程序中附原理图，是模拟ADC，采用的是内部比较器实现的，STC15W204S单片机本身不带AD-STC15W204S MCU AD sampling program, the figure, the principle is to simulate the ADC, USES is the internal comparator, STC15W204S microcontroller itself without AD