使用高效率SPI外圍設(shè)備的低成本基于MCU的物聯(lián)網(wǎng)設(shè)計(jì)

　　物聯(lián)網(wǎng)的高效設(shè)計(jì)必須平衡一系列相互矛盾的要求。低成本是重要的，但通常支持應(yīng)用程序所需的所有關(guān)鍵功能，增加MCU引腳計(jì)數(shù)和內(nèi)存大小的兩件事情，反對(duì)低成本。低功耗也是重要的物聯(lián)網(wǎng)應(yīng)用電池操作是必須的。添加功能和提高性能可以提高電力需求，但是。清楚地找到所有這些要求之間的平衡可能是一個(gè)問(wèn)題，但這只是工程師的挑戰(zhàn)，從尖端設(shè)計(jì)的類型。

　　一把這設(shè)計(jì)Gordian結(jié)的最有效的方法是尋找系統(tǒng)架構(gòu)的變化，不同的框架問(wèn)題。例如，有效地使用串行接口，可以減少M(fèi)CU所需的引腳數(shù)量，并有助于優(yōu)化電路板的空間，功耗和性能。高效利用單片機(jī)SPI外設(shè)就可以做到這一點(diǎn)。本文將展示一些說(shuō)明物聯(lián)網(wǎng)應(yīng)用程序的例子，SPI風(fēng)格的外設(shè)提供了新的架構(gòu)選項(xiàng)，極大地提高效率。

　　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.