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你好,谢谢你的回答。我还有个问题,关于rtck管脚。1.该管脚同样是复用管脚,请问在连接时如何处理,同时资料里备注说要特别注意该管脚,因为该管脚在pinmux之前状态不确定。2.该管脚下载口和管脚之间33欧姆的电阻是必须要接的吗?谢谢你!