这是关于硬件的相关知识！介绍了关于硬件工程师的相关知识！系统的说明了-This is the relevant knowledge on the hardware! Information on the hardware engineers knowledge! And systematic explanation of the

介绍sim5218的硬件接口和技术参数，有助于更好了解产品和帮助工程师开发。-Introduction sim5218 hardware interface and technical parameters, to help better understand and help engineers to develop products.