HS_USB2.0 host
RM0082
442/844
Doc ID 018672 Rev 1
[09]
RWC
0b
R/W
R
RemoteWakeupConnected
This bit indicates whether HC supports remote wakeup
signaling. If remote wakeup is supported and used by the
system it is the responsibility of system firmware to set
this bit during POST. HC clears the bit upon a hardware
reset but does not alter it upon a software reset. Remote
wakeup signaling of the host system is host-bus-specific
and is not described in this specification.
[08]
IR
0b
R/W
R
InterruptRouting
This bit determines the routing of interrupts generated by
events registered in HcInterruptStatus. If clear, all
interrupts are routed to the normal host bus interrupt
mechanism. If set, interrupts are routed to the System
Management Interrupt. HCD clears this bit upon a
hardware reset, but it does not alter this bit upon a
software reset. HCD uses this bit as a tag to indicate the
ownership of HC.
[07:06]
HCFS
00b
R/W
R
HostControllerFunctionalState for USB
00b: USBRESET
01b: USBRESUME
10b: USBOPERATIONAL
11b: USBSUSPEND
A transition to USBOPERATIONAL from another state
causes SOF generation to begin 1 ms later. HCD may
determine whether HC has begun sending SOFs by
reading the StartofFrame field of
HcInterruptStatus.
This field may be changed by HC only when in the
USBSUSPEND state. HC may move from the
USBSUSPEND state to the USBRESUME state after
detecting the resume signaling from a downstream port.
HC enters USBSUSPEND after a software reset, whereas
it enters USBRESET after a hardware reset. The latter
also resets the RootHub and asserts subsequent reset
signaling to downstream ports.
[05]
BLE
0b
R/W
R
BulkListEnable
This bit is set to enable the processing of the Bulk list in
the next Frame. If cleared by HCD, processing of the Bulk
list does not occur after the next SOF. HC checks this bit
whenever it determines to process the list. When disabled,
HCD may modify the list. If HcBulkCurrentED is pointing
to an ED to be removed, HCD must advance the pointer
by updating HcBulkCurrentED before re-enabling
processing of the list.
Table 367.
HcControl register bit assignments (continued)
Bits
Name
Reset
Read/Write
Description
HCD
HC