当TUSB8020B 使用USB2.0全速模式时,各个USB端口的SSTXP、SSTXM和SSRXP、SSRXM的差分线直接拉低不接就可以了吗?还需要其他设置嘛?主要考虑是对内核电压1.1V的选型问题,选用300mA的LDO可以正常使用嘛?
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