面向EEPROM应用的SPI主控制器设计与实现

Design and Implementation of SPI Controller for EEPROM Application

串行同步总线SPI提供了微处理器和其他外设之间的接口标准。但许多微处理器或微控制器中没有SPI接口,造成了数据通信的不便,解决的办法是将SPI核集成到芯片中。鉴于此,在研究SPI总线协议的基础上,以外设EEPROM初始化外围部件互连总线PCI中的配置寄存器为例,介绍了集成在芯片中的SPI主控制器访问外设EEPROM的具体过程,给出了设计逻辑框图和各个模块的实现及电路综合情况。在modelsim中完成功能仿真,并进行FPGA验证,结果正确,达到了设计的预期目的。

Synchronous SPI serial bus provides interface standards between microprocessor and other peripherals. But many microprocessor or microcontroller have not SPI interface, resulting in data communications inconvenience, the solution to integrate SPI core into the chip. In view of this, basing of researching SPI bus protocol, the external EEPROM initializes PCI configuration registers, for example, the theory and the way of implementing an SPI controller accessing EEPROM with integrated in the chip are introduced, and the logical block diagram and implementation of each modules and circuit synthesis are presented. The results of modelsim simulation and FPGA verification are correct and meet the design intended purpose.