图7-19:HcRhDescriptorA寄存器 寄存器位布局(31:0) 字段功能说明 The HcRhDescriptorA register is the first register of two describing the characteristics of the Root Hub. Reset values are implemen...
HCR CLF BLF bit[3] OCR SOC The HcCommandStatus register is used by the Host Controller to receive commands issued by the Host Controller Driver, as well as reflecting the cur...
A Transfer Descriptor (TD) is a system memory data structure that is used by the Host Controller to define a buffer of data that will be moved to or from an endpoint. TDs come in ...
4.3.1.1 General Transfer Descriptor Format 4.3.1.2 General Transfer Descriptor Field Definitions Transfers for control, bulk, and interrupt all use the same format for their Tra...
All registers included in this partition are dedicated to the USB Root Hub which is an integral part of the Host Controller though still a functionally separate entity. The HCD em...