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): 69/95頁
文件大?。?/td> 423K
代理商: ΜPD9210FGC-7EA
CHAPTER 5 REGISTER INFORMATION
69
Register: HcDoneHead
Offset Address: 30h
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
3 : 0
R
R
00h
DoneHead (DH)
31 : 4
R
R/W
0h
This is the physical address of the last TD to be added to
the Done queue.
Register: HcFmInterval
Offset Address: 34h
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
FrameInterval (FI)
13 : 0
R/W
R
2EDFh
This bit indicates a bit time value for the time interval per
frame.
Reserved
15 : 14
R/W
R
Xh
Reserved
FSLargestDataPacket
(FSMPS)
30 : 16
R/W
R
0000h
This is the maximum number of data bits that can be sent
or received in one transaction.
FrameIntervalToggle (FIT)
31
R/W
R
0b
This is inverted when loading to FI.
Register: HcFmRemaining
Offset Address: 38h
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
FrameRemaining (FR)
13 : 0
R
R/W
0h
This is a 14-bit down counter which indicates the
remaining bit time in the current frame.
Reserved
30 : 14
R/W
R
Xh
Reserved
FrameRemainingToggle
(FRT)
31
R
R/W
0b
When the value of FR becomes “0”, a value is loaded from
the FIT field of the HcFmInterval register.
Register: HcFmNumber
Offset Address: 3Ch
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
FrameNumber (FN)
15 : 0
R
R/W
0h
This is a 16-bit counter that is incremented when
HcFmRemaining is reloaded.
Reserved
31 : 16
R/W
R
Xh
Reserved
Register: HcPeriodicStart
Offset Address: 40h
Read/Write
Field
Bit
HCD
HD
Value
(Default)
Comment
PeriodicStart (PS)
13 : 0
R/W
R
0h
This indicates that periodic list servicing should be started.
The standard value is 3E67h.
Reserved
31 : 14
R/W
R
Xh
Reserved
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