那么，如何为新设计选择微控制器呢？您是否去您熟悉并使用了一段时间的MCU？还是您选择公司推荐的芯片？还是搜索适合应用程序的东西？
正如你们中的许多人所经历的那样，这不是一个容易的选择。由于数十家公司在许多变化中都制作了MCU，因此您的替代方案是压倒性的。一种方法是从头开始并写出您的需求，需求和规格列表，并尝试将其与可用设备相匹配。另外，这并不容易。
- 新的MCU投资组合重新定义了微控制器性能，使处理能力比现有设备高10倍
- 5 ways high-performance MCUs are reshaping the industry
- 使用SITARA™AM2X MCUS在实时控制，网络和分析中革新性能
One application space needing lots of attention today is theindustrial IoT (IIoT), or Industry 4.0。This includes factory automation, industrial control, and anything with robots, motor control, and smart vehicles. Using those targets as examples, here are some of the various features, needs, and specifications that you might identify:
- 实时控制：如此众多的制造功能，尤其是机器人需要实时计算。无论是什么，它都必须快速并立即完成。这需要处理器速度和/或多个处理器。
- 联网：Practically everything in smart factories, automobiles, or wherever is connected to something else, and networking is an inherent feature of the whole Industry 4.0 definition. Not only do you need conventional networking connections, but also special fieldbuses or the popular Ethernet-based links to sensors and actuators and other devices.
- 电机控制：Industry applications always involve lots of motors—and different types of motors. A processor that can handle some of the more advanced motor-control algorithms is essential.
- 机器人：机器人无处不在。他们需要特殊处理。通常，实时控制
- Edge computing:趋势是在网络或设施的边缘进行处理。也就是说，让本地计算机或服务器在数据收集点执行计算。在边缘而不是在云中进行的分析对于获得想要的性能很重要。
- Low latency:在大多数新的高性能设计的计算和网络中，此功能已成为关键要求。这就是使实时成为可能的原因。
Thesefive categories essentially sum up your needs：
- 高性能 - 可能需要比当前设计的10倍性能提高。
- Real-time control a must in computing and networking.
- 力量efficiency—reasonable power consumption despite the conflicting speed requirements.
- Design simplicity and reuse.
- 成本优化。
您的处理器可以这样做吗？
这个MCU可以做到这一点
Texas Instruments最近宣布了其Sitara微控制器的新版本。Designated the AM243x line, these MCUs have the features described above。But how can they provide so much performance in a single chip? The answer: they integrate a significant amount of circuitry, including processors, memory, networking, I/O, accelerators, and security.
例如,三个样本上——AM243可用1, AM2432, and AM2434—give you one, two, or four 32-bit Arm-Cortex-R5F cores running at speeds up to 800 MHz each. Multiple cores let you partition critical parts of your design so that real-time response can be obtained where needed.
To aid in those endeavors, the AM243x MCUs put lots of RAM rather than flash into each core to ensure the required speed of data access or instruction execution. All this can take place with less than 1 W of power consumption.
As for networking, they offer just what factory automation engineers need—industrial network standard connections. The new Sitara MCUs include Ethernet with backward compatibility to handle 10/100 versions. Optional support is provided for Profinet IRT, Profinet RT, EtherNet/IP, EtherCAT, IO-Link Master, and time-sensitive networking (TSN).
有很多标准的I/O端口可以满足您的特定需求，包括支持RGMII 10/100/1000加能节能以太网，USB 2.0和3.1，六个I2C端口，两个UART，两个CAN-FD和七个SPI端口以及多个GPIO。模拟能力包括一个多路复用的12位，4-msample/s ADC和七个脉冲宽度调节（PWM）模块。
一个基本的加速器专注于安全和保障。它涵盖了所有主要的常见加密和身份验证协议。这些处理器还符合安全完整性水平（SIL）3标准IEC 61508标准的规格。
此外，芯片还包含一个具有过电压和欠压感应，电源/序列控制和其他功率相关功能的电源管理子系统。
Finally, these MCUs come in two sizes: a 17.2- × 17.2-mm, 441-pin FCBGA and an 11- × 11-mm, 293-pin FC/CSP.
有关所有基本功能的摘要，请参见Sitara AM243X MCUS的功能框图figure。
与Sitara AM243X这样的精致MCUS合作时，强大的软件支持至关重要。有多种形式可用。它始于LaunchPad开发套件，价格低于100美元。实时控制，网络，认证协议堆栈，网络解决方案和有用的控制算法可作为示例。
