AT43301
12
Table 14. DPx, DMx Hub Timings, Low-speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
t
LHDD
Hub Differential Data Delay
300.0
ns
t
LHDJ1
t
LHDJ2
t
LUHJ1
t
LUHJ2
Downstr Hub Diff Driver Jitter
To Next Transition, downst
For Paired Transitions, downst
To Next Transition, upstr
For Paired Transitions, upstr
-45.0
-15.0
-45.0
-45.0
45.0
15.0
45.0
45.0
ns
ns
ns
ns
t
SOP
Data Bit Width Distortion after SOP
-60.0
60.0
ns
t
LEOPD
Hub EOP Delay Relative to t
HDD
0
200.0
ns
t
LHESK
Hub EOP Output Width Skew
-300.0
300.0
ns
Table 15. Hub Event Timings
Symbol
Parameter
Condition
Min
Max
Unit
t
DCNN
Time to Detect a Downstream Port Connect Event
Awake Hub
Suspended Hub
2.5
2.5
2000.0
12000.0
µ
s
µ
s
t
DDIS
Time to Detect a Disconnect Event on Downstream Port
Awake Hub
Suspended Hub
2.5
2.5
2.5
10000.0
µ
s
µ
s
t
URSM
Time from Detecting Downstream Resume to
Rebroadcast
100.0
µ
s
t
DRST
Duration of Driving Reset to a Downstream Device
Only for a SetPortFeature
(PORT_RESET) request
10.0
20.0
ms
t
URLK
Time to Detect a Long K from Upstream
2.5
100.0
µ
s
t
URLSEO
Time to Detect a Long SEO from Upstream
2.5
10000.0
µ
s
t
URPSEO
Duration of repeating SEO Upstream
23
FS bit
time
