422 AMD Geodeā„¢ SC2200 Processor Data Book
Electrical Specifications
32580B
Figure 9-37. Data Signal Rise and Fall Timing DiagramFigure 9-38. Source Differential Data Jitter Timing Diagram
Rise Time Fall Time
tUSB_R1,2 tUSB_F1,2
90% 90%
10%10%
Differential
Data Lines
CL
CL
Full Speed: 4 to 20 ns at CL = 50 pF
Low Speed: 75 ns at CL = 50 pF, 300 ns at CL = 350 pF
tperiod_F
Paired Transitions
Consecutive Transitions
Differential
Data Lines
Crossover Points

N*t

period

_

F

+ t

USB_DJ11
N*tperiod_F + tUSB_DJ12
(1.3-2.0) V
tUSB_DJ12
tUSB_DJ11
tperiod_L
tUSB_DJD21
tUSB_DJU21
tUSB_DJD22
tUSB_DJU22
N*tperiod_L + tUSB_DJD21
N*tperiod_L + tUSB_DJU21
N*tperiod_L + tUSB_DJD22
N*tperiod_L + tUSB_DJU22