USB3500-ABZJ Standard Microsystems (SMSC), USB3500-ABZJ Datasheet - Page 40

• Manufacturer Part Number: USB3500-ABZJ
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB3500-ABZJ

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Package Type: QFN
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

Revision 1.0 (06-05-08)
7.11
PARAMETER
TIMING
T0
T1
T2
T3
T4
Assertion of Resume
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).
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).
Table 7.9 HS Detection Handshake Timing Values from Suspend
illustrates the behavior of a device returning to HS mode after being suspended. At T4, a
Figure 7.7 Resume Timing Behavior (HS Mode)
DESCRIPTION
DATASHEET
40
Hi-Speed USB Host, Device or OTG 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 USB3500
Datasheet