SMSC USB3290 - Manual (Page 35)

Small Footprint Hi-Speed USB 2.0 Device PHY with UTMI Interface
Datasheet
SMSC USB3290 35 Revision 1.5 (11-02-07)
DATASHEET
Figure 8.5 HS Detection Handshake Timing Behavior (HS Mode)
Table 8.7 Reset Timing Values
TIMING
PARAMETER DESCRIPTION VALUE
T0 HS Handshake begins. DP pull-up enabled, HS
terminations disabled. 0 (reference)
T1 Device asserts Chirp K on the bus. T0 < T1 < HS Reset T0 + 6.0ms
T2 Device removes Chirp K from the bus. 1 ms
minimum width. T0 + 1.0ms < T2 <
HS Reset T0 + 7.0ms
T3 Downstream facing port asserts Chirp K on the
bus. T2 < T3 < T2+100µs
T4 Downstream facing port toggles Chirp K to Chirp J
on the bus. T3 + 40µs < T4 < T3 + 60µs
T5 Downstream facing port toggles Chirp J to Chirp K
on the bus. T4 + 40µs < T5 < T4 + 60µs
T6 Device detects downstream port chirp. T6
T7 Chirp detected by the device. Device removes DP
pull-up and asserts HS terminations, reverts to HS
default state and waits for end of reset. T6 < T7 < T6 + 500µs
T8 Terminate host port Chirp K-J sequence (Repeating
T4 and T5) T9 - 500µs < T8 < T9 - 100µs
T9 The earliest time at which host port may end reset.
The latest time, at which the device may remove
the DP pull-up and assert the HS terminations,
reverts to HS default state. HS Reset T0 + 10ms