Interface program design of A/D converter CS5550 and microcontroller

The interface features of two-channels,two-cost A/D converter CS5550 are analyzed.Using ATmega16 microcontroller as an example,the interface circuit of CS5550 and microcontroller is designed.After analyzing the SPI interface of ATmega16,hardware SPI interface and software-emulated SPI are fully discussed as two methods of interface program design.The corresponding software flowcharts are given.Finally,the two interface modes of CS5550 are compared.