288
AMD Geode™ SC1200/SC1201 Processor Data Book
Core Logic Module - USB Controller Registers - PCIUSB
32579B
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.
Offset 34h-37h
HcFmInterval Register (R/W)
Reset Value = 00002EDFh
31
FrameIntervalToggle (Read Only).
This bit is toggled by HCD when it loads a new value into FrameInterval.
30:16
FSLargestDataPacket (Read Only).
This field specifies a value which is loaded into the Largest Data Packet Counter at
the beginning of each frame.
15:14
Reserved.
Read/Write 0s.
13:0
FrameInterval.
This field specifies the length of a frame as (bit times - 1). For 12,000 bit times in a frame, a value of 11,999
is stored here.
Table 6-42. Memory Offset: USB Controller Registers (Continued)
Bit
Description
Summary of Contents for Geode SC1200
Page 8: ...8 AMD Geode SC1200 SC1201 Processor Data Book List of Figures 32579B...
Page 16: ...16 AMD Geode SC1200 SC1201 Processor Data Book Overview 32579B...
Page 24: ...24 AMD Geode SC1200 SC1201 Processor Data Book Architecture Overview 32579B...
Page 364: ...364 AMD Geode SC1200 SC1201 Processor Data Book Debugging and Monitoring 32579B...