Oki B4500 Maintenance Manual page 113

9) Timing Chart
a) Packet Voltage Levels
VOH (min)
VIH (min)
VIL (max)
VOL (max)
VOH (min)
VIH (min)
VIL (max)
VOL (max)
b) Disconnect Detection
VIHZ (min)
c) Full-speed Device Connect Detection
d) Differential Data Jitter
TPERIOD
Differential
Data Lines
(VCRS)
43502101TH Rev.1
VSS
Bus Idle
First Bit
SOP
of Packet
VSS
D+ / D-
VIL
D- / D+
VSS
Device
Connected
D+
VIH
D- / D+
VSS
Device
Connected
Crossover
Points
Consecutive
Transitions
N * TPERIOD + TxDJ1
N * TPERIOD + TxDJ2
Bus Driven to
Last Bit
J State at end
of Packet
of EOP
SE0
Portion
of EOP
≥2.5µS
DisConnect
Detected
D-
≥2.5µS
Connect
Detected
TPERIOD = 12Mbps (±0.25%)
TxDJ1 = Min-3.5ns~Max3.5ns
TxDJ2 = Min-4ns~Max4ns
Paired
Transitions
Oki Data CONFIDENTIAL
Bus
Floats
Bus Idle
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