參數(shù)資料
型號(hào): 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(jī)控制器(的USB主控制器)
文件頁(yè)數(shù): 54/95頁(yè)
文件大?。?/td> 423K
代理商: ΜPD9210FGC-7EA
CHAPTER 4 POWER MANAGEMENT
54
Table 4-3. Mutual Relation between Device State and PCI or USB
Device State
PCI State
USB State
Source of Request from USB to PCI
Control Output
Operational
Transaction
Reset
Suspend
D0
B0
Resume
Wakeup/Attach/Dettach
INTA
SMI
REQ
CRUN
Reset
Suspend
B0
Resume
Wakeup/Attach/Dettach
WAKE
Reset
Suspend
B1
Resume
Wakeup/Attach/Dettach
WAKE
Reset
Suspend
D2
B2
Resume
Wakeup/Attach/Dettach
WAKE
B0
Reset
B1
Reset
B2
Reset
D3
B3
Reset
Remarks 1.
The INTA signal operates completely asynchronously in relation to the PCI clock.
2.
When the device state is D2, the USB state must be a state other than Operational.
3.
When the device state is D3, the USB state must be RESET, the HC must be in power-off state, or
an HW_RST must occur.
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