可以这样说，异步通信在具有非常高的并发性的场景下可以实现更有效的资源使用，因为线程没有被打开并且可以实现更复杂的流控制。

It can be argued also that it provides more efficient use of resources in very high concurrency situations since threads are not held open and more complex flow control can be implemented.

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介绍了串口编程技术，RS485总线驱动模式和RS485串口驱动程序。 然后在此基础上设计和实现了SDM300远程控制模块和异步信道的通信模块。

Findally, we implement SDM300 remote control module and Async communication module on the basis of introducing technology of serial programming , RS485 bus driving mode and RS485 serial driver.

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说明了在异步通信方式下，可采用CRC检错码提高通信系统的差错控制能力。

It is explained that using CRC error detection code in asynchronous mode can enhance the error control ability of communication system.

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