使用高效率SPI外围设备的低成本基于MCU的物联网设计

　　使用高效率SPI外围设备的低成本基于MCU的物联网设计

　　物联网的高效设计必须平衡一系列相互矛盾的要求。低成本是重要的，但通常支持应用程序所需的所有关键功能，增加MCU引脚计数和内存大小的两件事情，反对低成本。低功耗也是重要的物联网应用电池操作是必须的。添加功能和提高性能可以提高电力需求，但是。清楚地找到所有这些要求之间的平衡可能是一个问题，但这只是工程师的挑战，从尖端设计的类型。

　　一把这设计Gordian结的最有效的方法是寻找系统架构的变化，不同的框架问题。例如，有效地使用串行接口，可以减少MCU所需的引脚数量，并有助于优化电路板的空间，功耗和性能。高效利用单片机SPI外设就可以做到这一点。本文将展示一些说明物联网应用程序的例子，SPI风格的外设提供了新的架构选项，极大地提高效率。

　　SPI connectivity in cost-oriented embedded designs

　　One of the most difficult tasks when designing cost-oriented systems is to balance functionality and cost. In MCU-based designs， this conundrum can often manifest itself in the need to add extra pins to the MCU so that additional peripherals can be added to the system. The extra functionality the peripherals provide are important differentiators that， hopefully， make the design more valuable to the user than a design that uses just the standard MCU. After all， the MCU with no external peripherals can be very difficult to differentiate from another MCU-based design.

　　And while it is true that in many MCU-based designs it’s the software that differentiates one design from another， it’s often the case that an innovative combination of software and external hardware is much more compelling. This can be even more important in cost-oriented designs where increasing the value to the user is more important than just keeping the cost low. In the fast growing and competitive IoT market finding the right value will be critical to product success.