Datasheet

695
SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
38.10.3 UDP and UHP Switching Characteristics
Figure 38-13. USB Data Signal Timing Diagram
Table 38-24. USB Data Signal Rise and Fall Time Characteristics (Low Speed)
Symbol Parameter Conditions Min Typ Max Unit
t
r
Transition Rise Time C
LOAD
= 400 pF 75 – 300 ns
t
f
Transition Fall Time C
LOAD
= 400 pF 75 – 300 ns
t
rfm
Rise/Fall time Matching C
LOAD
= 400 pF 80 – 125 %
Table 38-25. USB Data Signal Rise and Fall Time Characteristics (Full Speed)
Symbol Parameter Conditions Min Typ Max Unit
t
r
Transition Rise Time C
LOAD
= 50 pF 4 – 20 ns
t
f
Transition Fall Time C
LOAD
= 50 pF 4 – 20 ns
t
rfm
Rise/Fall time Matching – 90 – 111.11 %
10%
10%
90%
V
CRS
t
r
t
f
Differential
Data Lines
Rise Time Fall Time
f
osc
= 6 MHz/750 kHz
R
EXT
= 27 ohms
C
LOAD
Buffer