通讯控制器项目中，由于考虑到需要扩展8个或更多串口，SCC和SMC扩展显然不能满足要求，需要需求一种新的可扩展的串口芯片 -Communications controller projects, taking into account the need to expand as a result of 8 or more serial, SCC and SMC expansion obviously does not meet the requirements, the need to demand a new scalable serial chip
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