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 图7-7: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....
bit[8] IR bit[8] IR This bit determines the routing of interrupts generated by events registered in HcInterruptStatus. If clear, all interrupts are routed to the normal host bu...
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...
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...
字段功能说明 The HcRhPortStatus[1:NDP] register is used to control and report port events on a per-port basis. NumberDownstreamPorts represents the number of HcRhPortStatus registers t...