关键词: serial, RS-232, rs232, 232, SPI, 3-wire, A/D, ADC converter, analog to digital, analog digital, converters, MAX232, MAX220
Abstract: This application note provides an example of interfacing an A/D converter to a PC using a standard serial port. The CS lines and SCLK lines are emulated by the RTS and DTR lines respectively. Conversion data appears on the data-set-ready (DSR) line. Example C code is given to demonstrate the application circuit.
PC Serial Port Drives 12-Bit A D Converter.pdf 
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