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USB host block registers
756
NS9750 Hardware Reference
HcRhStatus register
Address: 9010 1050
The HcRhStatus register has two parts:
The lower word of a Dword represents the hub status field.
The upper word of the Dword represents the hub status change field.
Register bit assignment
D15:00 R/W DR IS DeviceRemovable
Each bit is dedicated to a root hub port.
When cleared, the attached device is removable.
When set, the attached device is not removable.
Bit 0: Reserved
Bit 1: Device attached to port #1
Bit 2: Device attached to port #2
...
Bit 15: device attached to port #15
Bits Access Mnemonic Reset Description
Table 442: HcRhDesdcriptorB register
Bits Access Mnemonic Reset Description
D31 W CRWE N/A ClearRemoteWakeupEnable
0 Has no effect
1 Clears DeviceRemoveWakeupEnable
D30:18 N/A Not used N/A Always write to 0.
Table 443: HcRhStatus register
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Not used
CRWE
CCIC
LPSC
DRWE Not used
OCI LPS