cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 280

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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USB Register Descriptions
5.5.4.5
USB Memory Offset
Type
Reset Value
Writing a 1 to a bit in this register sets the corresponding bit, while writing a 0 leaves the bit unchanged.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
29:7
Bit
31
30
6
5
4
3
2
1
0
Host Controller Interrupt Enable (USBC_HcInterruptEnable)
Name
RSVD
Ownership
Change
RSVD
RootHubStatus
Change
FrameNumber
Overflow
Unrecoverable
Error
Resume
Detected
StartOfFrame
WritebackDone
Head
Scheduling
Overrun
HCD:
HC:
10h
R/W
RO
00000000h
HCD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
USBC_HcInterruptStatus Bit Descriptions
USBC_HcInterruptStatus Register Map
(Continued)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
HC
RSVD
Description
Reserved. Read/write 0s.
Ownership Change. This bit is set when the OwnershipChang-
eRequest bit of HcCommandStatus is set.
Reserved. Read/write 0s.
Root Hub Status Change. This bit is set when the content of
HcRhStatus or the content of any HcRhPortStatus register has
changed.
Frame Number Overflow. Set when bit 15 of FrameNumber
changes value.
Unrecoverable Error (Read Only). This event is not imple-
mented and is hard-coded to 0. HCD clears this bit.
Resume Detected. Set when HC detects resume signaling on a
downstream port.
Start Of Frame. Set when the Frame Management block signals
a Start of Frame event.
Writeback Done Head. Set after the HC has written HcDone-
Head.
Scheduling Overrun. Set when the List Processor determines a
Schedule Overrun has occurred.
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