USB3450-FZG SMSC [SMSC Corporation], USB3450-FZG Datasheet - Page 36

• Manufacturer Part Number: USB3450-FZG
• Description: HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE
• Manufacturer: SMSC [SMSC Corporation]

Revision 0.1 (05-11-05)
7.11
PARAMETER
TIMING
T0
T1
T2
T3
T4
To detect the assertion of the downstream Chirp K's and Chirp J's for 2.5us {T
the appropriate LINESTATE signals asserted continuously for 165 CLKOUT cycles.
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 Link may negate SUSPENDN, allowing the transceiver (and its
oscillator) to power up and stabilize.
Figure 7.7
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 DATA bus for at least 1ms (T1 - T2).
Assertion of Resume
Table 7.8 HS Detection Handshake Timing Values from Suspend
While in suspend state an SE0 is detected on the USB. HS
Handshake begins. D+ pull-up enabled, HS terminations
disabled, SUSPENDN negated.
First transition of CLKOUT. CLKOUT "Usable" (frequency
accurate to ±10%, duty cycle accurate to 50±5).
Device asserts Chirp K on the bus.
Device removes Chirp K from the bus. (1 ms minimum width)
and begins looking for host chirps.
CLK "Nominal" (CLKOUT is frequency accurate to ±500
ppm, duty cycle accurate to 50±5).
illustrates the behavior of a device returning to HS mode after being suspended. At T4, a
DESCRIPTION
DATASHEET
36
Hi-Speed USB Host or Device PHY With UTMI+ Interface
0 (HS Reset T0)
T0 < T1 < T0 + 5.6ms
T1 < T2 < T0 + 5.8ms
T2 + 1.0 ms < T3 <
T0 + 7.0 ms
T1 < T3 < T0 + 20.0ms
FILT
}, the Link must see
VALUE
SMSC USB3450
Datasheet