Description: We do a single-chip system, often encounter this kind of data collection, these data were collected, most by our I/O port expansion interface circuit directly, because most of the microcontroller 51 without AD converter, the analog acquisition must rely on A/D or V/F to achieve. Now we have to understand under what AD0809 and 51 single interface and its programming.
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51单片机AD0809电路设计程序+原理图.doc
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