Technical Reference Guide – Interface specifications > 26
T
IMING
CHART
Packet voltage levels
Disconnect detection
Full-speed device connect detection
VOH(min)
VIH(min)
VIL(max)
VOL(max)
VSS
Bus Idle
SOP
First Bit
of Packet
VOH(min)
VIH(min)
VIL(max)
VOL(max)
VSS
Last Bit
of Packet
SE0
Portion
of EOP
Bus Driven to
J State at end
of EOP
Bus Floats
Bus Idle
VIHZ(min)
VIL
VSS
D+/D-
D-/D+
‡2.5
μ
s
Device
Connected
Disconnect
Detected
D-
VIH
VSS
D+
D-/D+
‡2.5
μ
s
Device
Connected
Connect
Detected
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