參數(shù)資料
型號： μPD9210FGC-7EA
廠商： NEC Corp.
英文描述： USB Host Controller(USB主控制器)
中文描述： USB主機控制器（的USB主控制器）
文件頁數(shù)： 71/95頁
文件大?。?/td> 423K
代理商： ΜPD9210FGC-7EA
CHAPTER 5 REGISTER INFORMATION
71
Register: HcRhStatus
Offset Address: 50h
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
LocalPowerStatus (LPS)
Note
R
R
0b
The root hub does not support local power status.
ClearGlobalPower (CGP)
Note
0
W
R
0b
1: Power supply to all ports is off when PSM = 0.
When PSM = 1, only PPS is cleared for ports where
PPCM has not been set.
0: No change
OverCurrentIndicator
(OCI)
Note
1
R
R/W
0b
The following occurs when overcurrent status is reported
to all downstream ports at once.
1: Overcurrent status exists
0: Normal power supply operations
Be sure that this is set to “0” when overcurrent status is
to be reported to each port.
Reserved
14 : 2
R/W
R
Xh
Reserved
DeviceRemoteWakeupEnable
(DRWE)
Note
R
R
0b
0: CSC is not a remote wakeup event
1: CSC is a remote wakeup event
SetRemoteWakeupEnable
(SRWE)
Note
15
W
R
0b
1: Sets RWE
0: No change
LocalPowerStatusChange
(LPSC)
Note
R
R
0b
The root hub does not support local power status.
SetGlobalPower (SGP)
Note
16
W
R
0b
1: Power supply to all ports is on when PSM = 0.
When PSM = 1, only PPS is set for ports where PPCM
has not been set.
0: No change
OverCurrentIndicatorChange
(CCIC)
Note
17
R/W
R/W
0b
HC sets “1” when a change has occurred in OCI. It is
cleared when the HCD writes “1”. There is no change
when the HCD writes “0”.
Reserved
30 : 18
R/W
R
Xh
Reserved
ClearRemoteWakeupEnable
(CRWE)
Note
W
R
0b
1: Clears RWE
0: No change
other
31
R
R
0b
Note
This field can only be used for hardware resets.
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