參數(shù)資料
型號(hào)： FUSB2805MLX
廠商： Fairchild Semiconductor
文件頁(yè)數(shù)： 21/49頁(yè)
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(chēng)： FUSB2805MLXFSDKR
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FUSB2805 Rev. 1.0.3
28
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
High-Speed Suspend and Resume
The sequence of events for a host and HS peripheral
using FUSB2805 is described below and shown in
Sequence of events:
1.
HS Traffic
– Initially both the host and peripheral
are idle. The host has its 15
kΩ pull-down resistors
enabled
(DP_PULLDOWN=DM_PULLDOWN=1b)
and
the
45
Ω
terminations
enabled
(TERMSELECT=0b). The peripheral has its 45
Ω
terminations enabled (TERMSELECT=0b).
2.
FS Suspend - If the peripheral detects no bus
activity for 3 ms, it enters the suspend state. The
peripheral link places the FUSB2805 into FS mode
(XCVRSELECT[1:0]=01b),
removes
the
45
Ω
terminations,
and
enables
the
1.5
kΩ pull-up
resistor on DP (TERMSELECT=1b). The peripheral
link then places the FUSB2805 into low-power
mode by clearing the SUSPENDM bit in the
FUNC_CTRL register, causing the FUSB2805 to
draw only suspend current. The host also changes
the
FUSB2805
to
FS
mode
(XCVRSELECT[1:0]=01b),
removes
the
45
Ω
terminations (TERMSELECT=1b), and may or may
not be powered down.
3.
Resume K
– When the host wishes to wake the
peripheral, it sets OPMODE[1:0]=10b and transmits
a full-speed K-state for at least 20 ms. The
peripheral link detects the resume-K (10b) on
LINESTATE and asserts STP to wake FUSB2805.
4.
HS
Traffic
–
the
host
link
sets
HS
(XCVRSELECT[1:0]=00b) and enables its 45
Ω
terminations (TERMSELECT=0b). The peripheral
link detects SE0 on LINESTATE, sets HS mode
(XCVRSELECT[1:0]=00b), and enables its 45
Ω
terminations (TERMSELECT=0b). The host link
sets OPMODE[1:0]=00b for normal HS operation.
ULPI HOST
in HS Mode
D0-D7
STP
NXT
K
TXCMD
NOPID
TXCMD
RegWr
OpMode
00
(Normal)
K
…..
TXCMD
HS Traffic
10 (chirp)
00
(Normal)
DIR
TXCMD
RegWr
NXT
STP
D0-D7
01 (FS)
00 (HS)
XcvrSelect
OpMode
00
(Normal)
10 (chirp)
00
(Normal)
FS Suspend
Resume-K
ULPI Peripheral
in FS Mode
D+
D-
USB Signals
TXCMD
CLOCK
LineState
FS J
FS K
LINESTATE J
LINESTATE K
SE0
TXCMD
RegWr
TermSelect
HS Traffic
DP_PULLDOWN=1b, DM_PULLDOWN=1b
DP_PULLDOWN=0b
TXCMD
RegWr
TXCMD
RegWr
01 (FS)
00(HS)
XcvrSelect
TermSelect
SuspendM
00
!squelch
(01b)
squelch
(00b)
squelch
(00b)
!squelch
(01b)
TXCMD
RegWr
00 (HS)
LineState
!squelch
(01b)
Squelch
(00b)
FS J
(01b)
FS K
(10b)
squelch
(00b)
!squelch
(01b)
Figure 16.
HS Suspend and Resume Timing
Note:
19. Timing is not to scale and not all the RXCMD updates or bus turn-around cycles are necessarily shown. The bus
turn-around cycles would be included for one cycle after every assertion and de-assertion of DIR.
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