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參數(shù)資料
| 型號(hào)： | GT3200-JD |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | Aluminum Electrolytic Radial Leaded General Purpose Capacitor; Capacitance: 33uF; Voltage: 16V; Case Size: 5x11 mm; Packaging: Bulk |
| 中文描述： | DATACOM, INTERFACE CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, 0.5 MM PITCH, TQFP-64 |
| 文件頁數(shù)： | 42/51頁 |
| 文件大?。?/td> | 1462K |
| 代理商： | GT3200-JD |
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USB2.0 PHY IC
Revision 1.3 (10-05-04)
37
SMSC GT3200, SMSC USB3250
DATASHEET
8.11
Assertion of Resume
In this case, an event internal to the device initiates the resume process. A device with remote wake-
up capability must wait for at least 5ms after the bus is in the idle state before sending the remote
wake-up resume signaling. This allows the hubs to get into their suspend state and prepare for
propagating resume signaling.
The device has 10ms where it can draw a non-suspend current before it must drive resume signaling.
At the beginning of this period the SIE may negate SUSPENDN, allowing the transceiver (and its
oscillator) to power up and stabilize.
Figure 8.7
illustrates the behavior of a device returning to HS mode after being suspended. At T4, a
device that was previously in FS mode would maintain TERMSELECT and XCVRSELECT high.
To generate resume signaling (FS 'K') the device is placed in the "Disable Bit Stuffing and NRZI
encoding" Operational Mode (OPMODE [1:0] = 10), TERMSELECT and XCVRSELECT must be in FS
mode, TXVALID asserted, and all 0's data is presented on the TXDATA bus for at least 1ms (T1 - T2).
Figure 8.7 Resume Timing Behavior (HS Mode)
Table 8.9 Resume Timing Values (HS Mode)
TIMING
PARAMETER
DESCRIPTION
VALUE
T0
Internal device event initiating the resume process
0 (reference)
T1
Device asserts FS 'K' on the bus to signal resume
request to downstream port
T0 < T1 < T0 + 10ms.
T2
The device releases FS 'K' on the bus. However by
this time the 'K' state is held by downstream port.
T1 + 1.0ms < T2 < T1 + 15ms
T3
Downstream port asserts SE0.
T1 + 20ms
T4
Latest time at which a device, which was previously
in HS mode, must restore HS mode after bus activity
stops.
T3 + 1.33μs {2 Low-speed bit
times}
TXVALID
T0
T3
T4
T1
T2
'K' State
FS Idle ('J')
SUSPENDN
DP/DM
XCVRSELECT &
TERMSELECT
SE0
FS Mode
HS Mode
time
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