cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 287

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

Revision 0.8
USB Register Descriptions
5.5.4.17
USB Memory Offset
Type
Reset Value
5.5.4.18
USB Memory Offset
Type
Reset Value
5.5.4.19
USB Memory Offset
Type
Reset Value
This register is only reset by a power-on reset (PCIRST#). It is written during system initialization to configure the Root Hub.
These bit should not be written during normal operation.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31:14
30:12
13:0
11:0
Bit
Bit
Host Controller Periodic Start (USBC_HcPeriodicStart)
Host Controller Low Speed Threshold (USBC_HcLSThreshold)
Host Controller Root Hub Descriptor A (USBC_HcRhDescriptorA)
Name
RSVD
PeriodicStart
Name
RSVD
LSThreshold
HCD:
HC:
HCD:
HC:
HCD:
HC:
40h
R/W
RO
00000000h
44h
R/W
RO
00000628h
48h
R/W
RO
01000002h
RSVD
RSVD
HCD
HCD
R/W
R/W
R/W
R/W
USBC_HcPeriodicStart Bit Descriptions
USBC_HcLSThreshold Bit Descriptions
(Continued)
USBC_HcPeriodicStart Register Map
USBC_HcLSThreshold Register Map
HC
RO
RO
HC
RO
RO
Description
Reserved. Read/write 0s.
Periodic Start. This field contains a value used by the List Pro-
cessor to determine where in a frame the Periodic List process-
ing must begin.
Description
Reserved. Read/write 0s.
LS Threshold. This field contains a value used by the Frame
Management block to determine whether or not a low speed
transaction can be started in the current frame.
287
9
9
8
8
PeriodicStart
7
7
LSThreshold
6
6
5
5
4
4
3
3
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2
2
1
1
0
0