由SPI总线构成的多回路控制模块的设计

Desige of Multi-path control Module by SPI Bus

介绍了SPI总线工作原理 ,给出了由 89S82 5 2和SPI总线接口芯片所组成的多回路控制模块的设计方案以及与RS -

Introduced workimg principle of SPI bus ,A scheme of 89S8252 chip and SPI bus interface chip constituted by multi-path control module and RS-485 interface linking data structure was given in this paper.