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关于TUSB8041中Port Used Configuration Register的设置

在数据手册中,该寄存器类型为RW,且称“All combinations are supported with the exception of both ports 1 and 3 marked as disabled.”这是否意味着可以写入该register从而将port至为disable?如果可以,请问HUB内部的逻辑是将PHY至为disable,还是将PWRCTL至为disable,或是其他逻辑?

谢谢!

  • 这个寄存器的作用四个下行端口的使能配置,bit0代表的下行端口1,bit1代表的端口2,以此类推。

    All combinations are supported with the exception of both ports 1 and 3 marked as disabled这句的意思是说排列组合方式都能支持,除了将port1和port3 disable之外。

    disable的意思比如bit0=0,说明下行端口1 disable掉,而不是PWRCTL disable。