USB2.0 PHY IC
T0
T1
T2
time
VBUS
Device Reset
XCVRSELECT
TERMSELECT
DP/DM
SE0
Idle (FS 'J')
HS Detection
Handshake
Figure 8.8 Device Attach Behavior
Table 8.10 Attach and Reset Timing Values
DESCRIPTION
TIMING
PARAMETER
VALUE
T0
T1
Vbus Valid.
0 (reference)
Maximum time from Vbus valid to when the device
must signal attach.
T0 + 100ms < T1
T2 (HS Reset T0)
Debounce interval. The device now enters the HS
Detection Handshake protocol.
T1 + 100ms < T2
Revision 1.3 (10-05-04)
SMSC GT3200, SMSC USB3250
DATA3S9HEET