W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 136

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

Host Controller Root Hub Descriptor A Register (HcRhDescriptorA)
This register is only reset by a power-on reset. It is written during system initialization to configure the
Root Hub. This bit should not be written during normal operation.
HcRhDescriptorA
Register: HcRhDescriptorA
23-13
31-24
BITS
7-0
REGISTER
10
11
12
8
9
RESET
02h
01h
0h
0
0
0
0
0
0xFFF0.5048
ADDRESS
R/W
R/W
R/W
R/W
R/W
R/W
R
R
-
NumberDownstreamPorts
table of none-4 supports two downstream ports.
PowerSwitchingMode
Global power switching mode implemented in HYDRA-2. This bit is only
valid when NoPowerSwitching is cleared. This bit should be written '0'.
NoPowerSwitching
Global power switching implemented in HYDRA-2. This bit should be
written to support the external system port power switching implementation.
DeviceType
table of none-4is not a compound device.
OverCurrentProtectionMode
Global over-current reporting implemented in HYDRA-2. This bit should be
written 0 and is only valid when NoOverCurrentProtection is cleared.
NoOverCurrentProtection
Global over-current reporting implemented in HYDRA-2. This bit should be
written to support the external system port over-current implementation.
PowerOnToPowerGoodTime
This field value is represented as the number of 2 ms intervals, which
ensuring that the power switching 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 0's
R/W
R/W
0 = Global Switching
1 = Individual Switching
0 = Ports are power switched.
1 = Ports are always powered on.
0 = Global Over-Current
1 = Individual Over-Current
0 = Over-current status is reported
1 = Over-current status is not reported
Host Controller Root Hub Descriptor A
Register
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W90N740CD/W90N740CDG
DESCRIPTION
Publication Release Date: September. 19, 2005
DESCRIPTION
0x0100.0002
VALUE
RESET
Revision A7