W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 137

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

Host Controller Root Hub Descriptor B Register (HcRhDescriptorB)
This register is only reset by a power-on reset. It is written during system initialization to configure the
Root Hub. These bits should not be written during normal operation.
HcRhDescriptorB
Register: HcRhDescriptorB
31-16
15-0
Bits
Register
Reset
0000h
0000h
0xFFF0.504C
Address
R/W
R/W
R/W
Description
DeviceRemoveable
table of none-4 ports default to removable devices.
Port Bit relationship
Unimplemented ports are reserved, read/write '0'.
PortPowerControlMask
Global-power switching. This field is only valid if NoPowerSwitching is
cleared and PowerSwitchingMode is set (individual port switching). When
set, the port only responds to individual port power switching commands
(Set/ClearPortPower). When cleared, the port only responds to global
power switching commands (Set/ClearGlobalPower).
Port Bit relationship - Unimplemented ports are reserved, read/write '0'.
R/W
R/W
0 = Device not removable
1 = Device removable
0 : Reserved
1 : Port 1
2 : Port 2
...
15 : Port 15
0 = Device not removable
1 = Global-power mask
0 : Reserved
1 : Port 1
2 : Port 2
...
15 : Port 15
Host Controller Root Hub Descriptor B
Register
- 134 -
W90N740CD/W90N740CDG
Description
0x0000.0000
Reset Value