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...
7.2.1 HcHCCA Register HcHCCA寄存器 寄存器位布局 寄存器字段说明 关键说明: 7.2.1 HcHCCA Register The HcHCCA register contains the physical address of the Host Controller Communication Area. The ...
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 ...
Figure 3-1 shows four main focus areas of a Universal Serial Bus (USB) system. These areas are the Client Software/USB Driver, Host Controller Driver (HCD), Host Controller (HC), ...
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...