The Host Controller (HC) contains a set of on-chip operational registers which are mapped into a noncacheable portion of the system addressable space . These registers are used...
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 ...
An Endpoint Descriptor (ED) is a 16-byte, memory resident structure that must be aligned to a 16-byte boundary . The Host Controller traverses lists of EDs and if there are TDs lin...
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...
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...