AMD Geode SC2200 User Manual
Page 285
AMD Geode™ SC2200 Processor Data Book
297
Core Logic Module - USB Controller Registers - PCIUSB
32580B
6
RootHubStatusChangeEnable.
0: Ignore.
1: Disable interrupt generation due to Root Hub Status Change.
5
FrameNumberOverflowEnable.
0: Ignore.
1: Disable interrupt generation due to Frame Number Overflow.
4
UnrecoverableErrorEnable. This event is not implemented. All writes to this bit will be ignored.
3
ResumeDetectedEnable.
0: Ignore.
1: Disable interrupt generation due to Resume Detected.
2
StartOfFrameEnable.
0: Ignore.
1: Disable interrupt generation due to Start of Frame.
1
WritebackDoneHeadEnable.
0: Ignore.
1: Disable interrupt generation due to Writeback Done Head.
0
SchedulingOverrunEnable.
0: Ignore.
1: Disable interrupt generation due to Scheduling Overrun.
Note:
Writing a 1 to a bit in this register clears the corresponding bit, while writing a 0 to a bit leaves the bit unchanged.
Offset 18h-1Bh
HcHCCA Register (R/W)
Reset Value = 00000000h
31:8
HCCA. Pointer to HCCA base address.
7:0
Reserved. Read/Write 0s.
Offset 1Ch-1Fh
HcPeriodCurrentED Register (R/W)
Reset Value = 00000000h
31:4
PeriodCurrentED. Pointer to the current Periodic List ED.
3:0
Reserved. Read/Write 0s.
Offset 20h-23h
HcControlHeadED Register (R/W)
Reset Value = 00000000h
31:4
ControlHeadED. Pointer to the Control List Head ED.
3:0
Reserved. Read/Write 0s.
Offset 24h-27h
HcControlCurrentED Register (R/W)
Reset Value = 00000000h
31:4
ControlCurrentED. Pointer to the current Control List ED.
3:0
Reserved. Read/Write 0s.
Offset 28h-2Bh
HcBulkHeadED Register (R/W)
Reset Value = 00000000h
31:4
BulkHeadED. Pointer to the Bulk List Head ED.
3:0
Reserved. Read/Write 0s.
Offset 2Ch-2Fh
HcBulkCurrentED Register (R/W)
Reset Value = 00000000h
31:4
BulkCurrentED. Pointer to the current Bulk List ED.
3:0
Reserved. Read/Write 0s.
Offset 30h-33h
HcDoneHead Register (R/W)
Reset Value = 00000000h
31:4
DoneHead. Pointer to the current Done List Head ED.
3:0
Reserved. Read/Write 0s.
Table 6-42. USB_BAR+Memory Offset: USB Controller Registers (Continued)
Bit
Description