Core Logic Module - USB Controller Registers - PCIUSB

32579B

Table 6-42. USB_BAR+Memory Offset: USB Controller Registers (Continued)

Bit

 

Description

 

 

 

 

 

Offset 10h-13h

HcInterruptEnable Register (R/W)

Reset Value = 00000000h

 

 

 

31

 

MasterInterruptEnable. This bit is a global interrupt enable. A write of 1 allows interrupts to be enabled via the specific

 

 

enable bits listed above.

 

 

 

 

 

30

 

OwnershipChangeEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Ownership Change.

 

 

 

 

 

29:7

 

Reserved. Read/Write 0s.

 

 

 

 

 

6

 

RootHubStatusChangeEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Root Hub Status Change.

 

 

 

 

 

5

 

FrameNumberOverflowEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Frame Number Overflow.

 

 

 

 

 

4

 

UnrecoverableErrorEnable. This event is not implemented. All writes to this bit are ignored.

 

 

 

 

 

3

 

ResumeDetectedEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Resume Detected.

 

 

 

 

 

2

 

StartOfFrameEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Start of Frame.

 

 

 

 

 

1

 

WritebackDoneHeadEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Writeback Done Head.

 

 

 

 

 

0

 

SchedulingOverrunEnable.

 

 

 

0:

Ignore.

 

 

 

1: Enable interrupt generation due to Scheduling Overrun.

 

 

 

 

Note:

Writing a 1 to a bit in this register sets the corresponding bit, while writing a 0 leaves the bit unchanged.

Offset 14h-17h

HcInterruptDisable Register (R/W)

Reset Value = 00000000h

 

 

 

 

31

 

MasterInterruptEnable. Global interrupt disable. A write of 1 disables all interrupts.

 

 

 

 

 

30

 

OwnershipChangeEnable.

 

 

 

0:

Ignore.

 

 

 

1: Disable interrupt generation due to Ownership Change.

 

 

 

 

 

29:7

 

Reserved. Read/Write 0s.

 

 

 

 

 

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.

 

 

 

 

 

 

 

 

 

AMD Geode™ SC1200/SC1201 Processor Data Book

287

Page 287
Image 287
AMD SC1201 manual HcInterruptEnable Register R/W Reset Value = 00000000h, OwnershipChangeEnable, RootHubStatusChangeEnable