USB Host Hub Tier Level 

This constant defines the maximum hub tiers to be supported by the USB Host application. This constant is considered only if the USB_HOST_HUB_SUPPORT_ENABLE option in specified. If specified, the value should be atleast 1. This means that one hub should be supported. In a case where another hub will be be connected to the hub which is connected to the USB Host, the value should be 2. As per the USB specification the maximum number of non-root hub tiers can be 5. Hence the value of this configuration constant should not exceed 5.

#define USB_HOST_HUB_TIER_LEVEL 

None.