ST7920串行控制方法的研究

Research on ST7920 serial control method

文章介绍了ST7920与ARM7微处理器串行连接的接口电路,并介绍了微处理器控制ST7920的二种方法,即采用自带SPI串行总线及用IO口模拟串行总线时序的方法与ST7920通信,让液晶显示变得简单易行。

This paper introduces the serial interface circuit of ST7920 connected with ARM7 microprocessor, and introduces two methods of microprocessor control ST7920, which adopts the built-in SPI serial bus and serial bus timing simulation method with the IO port and ST7920 communication, Let the liquid crystal display becomes simple and easy.