Rev. 3.0, 03/01, page 320 of 390
HcInterruptStatus
All bits are set by hardware and cleared by software.
Table 18.26 HcInterruptStatus Register
Register: HcInterruptStatus
Offset: 0C-0F
Bits
Reset
R/W
Description
31
0h
-
Reserved. Read/Write 0's
30
0b
R/W
OwnershipChange
This bit is set when the OwnershipChangeRequest bit of
HcCommandStatus is set.
29 - 7
0h
-
Reserved. Read/Write 0's
6
0b
R/W
RootHubStatusChange
This bit is set when the content of HcRhStatus or the content of
any HcRhPortStatus register has changed.
5
0b
R/W
FrameNumberOverflow
This bit is set when bit 15 of FrameNumber changes value
from ‘0’ to ‘1’ or from ‘1’ to ‘0.’
4
0b
R
UnrecoverableError
This event is not implemented and is hard-coded to ‘0.’ All
writes are ignored.
3
0b
R/W
ResumeDetected
This bit is set when the Host Controller detects resume
signaling on a downstream port.
2
0b
R/W
StartOfFrame
This bit is set when the Frame Management block signals a
?tart of Frame’ event.
1
0b
R/W
WritebackDoneHead
This bit is set after the Host Controller has written HcDoneHead
to HccaDoneHead.
0
0b
R/W
SchedulingOverrun
This bit is set when the List Processor determines a Schedule
Overrun has occurred.
Summary of Contents for HD64465
Page 25: ...Rev 3 0 03 01 page 6 of 390 ...
Page 59: ...Rev 3 0 03 01 page 40 of 390 ...
Page 97: ...Rev 3 0 03 01 page 78 of 390 ...
Page 147: ...Rev 3 0 03 01 page 128 of 390 ...
Page 199: ...Rev 3 0 03 01 page 180 of 390 ...
Page 247: ...Rev 3 0 03 01 page 228 of 390 ...
Page 385: ...Rev 3 0 03 01 page 366 of 390 ...
Page 389: ...Rev 3 0 03 01 page 370 of 390 ...
Page 409: ...Rev 3 0 03 01 page 390 of 390 ...