USB与RS232接口转换器的设计

针对RS232接口向USB接口转换的需求,提出两类设计方案。一类方案以CY7C68013芯片为代表,从硬件底层固件开始,进行全面系统开发。另一类采用类似CP2102的USB/RS232双向转换专用芯片进行设计,只需对芯片功能了解和应用,无须深入开发。第一类方案由于成本和开发难度的限制而很少被采用,但在特殊的操作系统或专门的应用条件下是优选方案。第二类方案经常被采用,但因受到芯片生产商的限制而无法进行特殊的应用。应用设计人员可以根据实际情况选择适合的方案。

Design of USB/RS232 Converter

According to the demands of converting the RS232 to USB, two designations are proposed. One is presented upon the chip of CY7C68013, which is developed with an all-around systemic design beginning at the bottom device firmware. The other is designed with USB/RS232 bidirectional converter alike CP2102, which needs apprehension and application of chip function without a deep research. The first one is rarely adopted because of high cost and hard research, but it is preferential for special operating systems or special usage. The second one is introduced popularly, but its application is limited to fit some special purposes because of the chip producers. Designers may choose a way proper for ones own practice.