CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 305

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

USB Controller Register Descriptions
6.5.4.19 Host Controller Root Hub Descriptor A (USBC_HcRhDescriptorA)
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.
AMD Geode™ CS5535 Companion Device Data Book
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31:24
23:13
PowerOnToPowerGoodTime
Bit
7:0
12
11
10
9
8
HCD:
HC:
Name
PowerOnTo
PowerGoodTime
RSVD
NoOverCurrent
Protection
OverCurrent
ProtectionMode
DeviceType
NoPower
Switching
PowerSwitching
Mode
NumberDown-
streamPorts
48h
R/W
RO
01000002h
HCD
R/W
R/W
R/W
R/W
R/W
R/W
USBC_HcRhDescriptorA Bit Descriptions
RO
RO
USBC_HcRhDescriptorA Register Map
HC
RO
RO
RO
RO
RO
RO
RO
RO
RSVD
Description
PowerOn To PowerGood Time. This field value is represented
as the number of 2 ms intervals, ensuring that the power switch-
ing is effective within 2 ms. Only bits [25:24] are implemented as
R/W. The remaining bits are read only as 0. It is not expected
that these bits be written to anything other than 1h, but limited
adjustment is provided. This field should be written to support
system implementation. This field should always be written to a
non-zero value.
Reserved. Read/write 0s.
No Over-Current Protection. This bit should be written to sup-
port the external system port over-current implementation.
0: Over-current status is reported.
1: Over-current status is not reported.
Over Current Protection Mode. This bit should be written 0 and
is only valid when NoOverCurrentProtection is cleared.
0: Global Over-Current.
1: Individual Over-Current
Device Type (Read Only). USB is not a compound device,
therefore this field will return 0.
No Power Switching. This bit should be written to support the
external system port power switching implementation.
0: Ports are power switched.
1: Ports are always powered on.
Power Switching Mode. This bit is only valid when NoPower-
Switching is cleared. This bit should be written 0.
0: Global Switching.
1: Individual Switching
Number Downstream Ports (Read Only). USB supports two
downstream ports, therefore this field will return 02h.
9
8
31506B
7
NumberDownstreamPorts
6
5
4
3
2
1
305
0