基于ADS7230与ADSP21363的SPI通信接口电路设计

SPI Communication Interface Circuit Design based on ADS7230 and ADSP21363

针对数字信号处理系统中的模拟信号转换的要求和系统连线简单、结构紧凑的考虑,采用串行接口的A/D芯片来完成模拟信号转换成数字信号。根据TI公司的双通道、低功耗、高精度A/D转换器ADS7230的性能特点,以及AD公司的SHARC系列ADSP21363内设接口特点,设计了基于ADSP21363与ADS7230的SPI通信接口电路,并给出了接口的硬件电路图,SPI口串口通信软件程序流程图,以及部分驱动程序代码。实际应用结果表明,该设计合理可行。

Mainly introduce ways of adopting serial interface of A/D chip to convert the analog signal into digital signal.On the study of performance characteristic of A/D converter ADS7230, it is characterized as dual channel, low power con-sumption, and high precision. The SPI communication interface circuit is designed based on ADS7230 and ADSP21363. Dis-play the hardware circuit diagram, SPI serial communication software program flow chart, and parts of drive codes. The ac-tual application shows that the design is reasonable.