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參數(shù)資料
| 型號： | FUSB2805MLX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 22/49頁 |
| 文件大?。?/td> | 0K |
| 描述： | TXRX USB2.0 HS OTG ULPI 32MLP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
| 其它名稱： | FUSB2805MLXFSDKR |
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2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FUSB2805 Rev. 1.0.3
29
F
USB2
8
0
5
—
USB2
.0
High
-S
pee
d
OTG
Tra
nsc
e
iv
e
rw
ith
UL
P
I
Inter
fac
e
Remote Wake Up
The FUSB2805 supports peripherals that can initiate
remote wake-up. When placed into USB suspend, the
peripheral remembers the speed at which it was
originally
operating.
Depending
on
that
original
operating speed, the link follows one of the protocols
described below.
The sequence of events is:
1.
Both the host and peripheral are assumed to be in
low-power mode.
2.
The
peripheral
begins
remote
wake-up
by
re-enabling the clock and setting its SUSPENDM
bit=1b.
3.
The peripheral begins driving a K-state on the bus
to signal resume. The peripheral link must assume
that LINESTATE is K (01b) while transmitting (since
it does not receive any RXCMDs).
4.
The host recognizes the resume, re-enables its
clock, and sets its SUSPENDM bit.
5.
The host takes over resume driving within 1ms of
detecting the remote wake-up.
6.
The peripheral stops driving resume.
7.
The peripheral recognizes the host continuing to
drive the resume.
8.
The host stops driving resume and the FUSB2805
automatically adds the EOP to the end of resume.
The peripheral recognizes the EOP as the end
of resume.
9.
Both the host and peripheral revert to normal
operation by writing OPMODE[1:0]=00b. If the host
or the peripheral was previously in HS mode, it
must revert to HS mode before the SE0 of the EOP
is completed. This can be achieved by writing
XCVRSELECT[1:0]=00b
and
TERMSELECT=0b
after LINESTATE indicates SE0.
Figure 17 shows the remote wake-up timing.
ULPI Peripheral
STP
NXT
T1
LS EOP Interval
DIR
NXT
ULPI Host
D+
D-
USB Signals
Remote Wake Up Timing
TermSelect=1b
XcvrSelect
TermSelect
OpMode
10 (chirp)
00
(Normal)
D [7:0]
TXCMD
NOPID
TXCMD
RegWr
RXCMD
TXCMD
RegWr
Linestate
00h
RXCMD
D [7:0]
TXCMD
RegWr
Linestate
00h
STP
TXCMD
NOPID
TXCMD
RegWr
01 (FS) or 10( LS)
XcvrSelect
TermSelect
OpMode
10 (chirp)
00
(Normal)
00 (HS only)
1
2
5
4
3
9
8
7
6
Termselect = 0b for HS only
00 (HS), 01 (FS) or 10( LS)
00 (HS only)
Figure 17.
Remote Wake-Up from Low-Power Mode
Note:
20. Timing is not to scale and not all the RXCMD LINESTATE updates or bus turn-around cycles are necessarily
shown. The bus turn-around cycles are included for one cycle after every assertion and de-assertion of DIR.
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