一种波特率自动校准的通用异步收发器设计

Design of Universal Asynchronous Receiver/Transmitter with Self-adapting Baud Rate

阐述基于硬件描述语言设计了一个波特率自动校准的通用异步收发器。采用硬件法实时监测接收端波特率并更新分频系数,实现对接收波特率的自动校准。采用验证方法学对模块整体进行仿真验证,回归测试表明该设计可以实现数据串并转换功能,并且在收发双方波特率存在一定误差时,可以有效抑制接收数据时采样点的偏移。相比于传统异步收发器,可以在非标准波特率场景下更准确地采样数据。

This paper expounds that a universal asynchronous transceiver with baud rate selfadapting is designed. Real-time monitoring of the baud rate at the receiver and updating of the divisor by hardware method to achieve automatic calibration of the received baud rate. The whole module is simulated and verified by using the verification methodology. The regression test shows that the design can realize the serial-to-parallel data conversion function and can effectively suppress the offset of sampling points when receiving data when there is a certain baud rate error between the transceiver and the receiver. Compared with traditional asynchronous transceiver, it can sample data more accurately in non-standard baud rate scenarios.