包里有AD0809的源程序以及相关的外围电路pdf资料，通过将LM324N配置成反相比例缩小和电压跟随对外部电压信号降压，以及通过CD4081和89C52的ALE脚向AD0809输入500K的方波，从而实现89C52的AD采集。-The source code package with AD0809 and related peripheral circuits pdf information configured by LM324N RP scaled down and the voltage on the external voltage signal to follow the step-down, and through the CD4081 and the ALE pin 89C52 500K to the AD0809 input square wave, 89C52 collected in order to achieve the AD.