基于SPI接口通讯的终端安全芯片设计与实现

Design and implementation of secure chip for terminal based on SPI

文中通过对SPI接口通讯技术的研究,提出了一种应用于终端安全芯片接口通讯的解决方案,解决了终端安全芯片与微处理器的接口通讯低效的问题。文中首先分析了终端安全芯片的功能需求,描述了功能实现所依赖的硬件平台,接着给出了具体的软件设计和硬件设计,然后对采用SPI接口通讯所实现的加密算法功能进行了介绍。测试结果及试点情况表明这种设计方案具有实际的应用价值和良好的使用效果。

Based on the study of SPI communication technology,a solution for terminal chip applied in interface communication is proposed,thus to solve the problem of inefficient interface communication between secure chip and MCU. This paper firstly discusses the functional requirements of terminal secure chip and the hardware platform for those functional requirements. Then it gives the spe-cific design of software and hardware and the implementation of encryption algorithm via SPI communication. Test result and pilot pro-ject show that this design is of practical value and good effects.