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
