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如下：我们现在在测USB-IF，其中有项Test-J的测试，接入测试设备时，需要实现CDP模式切换到SDP模式，请问：TPS2546芯片如何实现上述功能？硬件实现还是软件实现？如何配置？ 这四个pin高低怎么设置？谢谢！
谢谢！
