AU6254 Datasheet, PDF (25/30 Pages) List of Unclassifed Manufacturers – USB2.0 Hub Controller

Clock Timings:
SYMBOL
T_HSDRAT
T_HSFRAM
T_HSRFI
PARAMETER
High-speed Data Rate
Micorframe Interval
Consecutive Microframe Interval Difference
LIMITS
MIN
MAX
UNIT
479.76
480.24
Mb/s
124.9375 125.0625
μs
4 high-speed
bit times
Table 5.7 Full-speed Source Electrical Characteristics
Driver Characteristics:
SYMBOL
PARAMETER
T_FR
T_FF
T_FRFM
Z_ZRV
Rise Time
Fall Time
Differential Rise and Fall Time Matching
Driver Output Resistance for driver which is not
high-speed capable
LIMITS
MIN
MAX
4
20
4
20
90
111.11
28
44
Clock Timings:
SYMBOL
T_FDRATHS
T_FDRATE
T_FRAME
T_RFI
PARAMETER
Full-speed Data Rate for hubs and devices
which are high-speed capable
Full-speed Data Rate for devices which are
not high-speed capable
Frame interval
Consecutive Frame Interval Jitter
LIMITS
MIN
MAX
11.994
12.006
11.970
0.9995
12.030
1.0005
42
UNIT
ns
ns
%
Ω
UNIT
Mb/s
Mb/s
Ms
ns
Full-speed Data Timings:
SYMBOL
PARAMETER
T_DJ1
T_DJ2
T_FDEOP
T_JR1
T_JR2
T_FEPPT
T_FEOPR
T_FST
Source Jitter Total(including frequency
tolerance):
To Next Transition
For Paired Transitions
Source Jitter for Differential Transition to SE0
Transition
Receiver Jitter:
To Next Transition
For Paired Transitions
Source SE0 interval of EOP
Receiver SE0 interval of EOP
Width of SE0 interval during differential
transition
LIMITS
MIN
MAX
-3.5
-4
-2
-18.5
-9
160
82
-3.5
-4
5
-18.5
-9
175
14
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
AU6254 USB2.0 Hub Controller V1.00W
Official Release_ Public
Page 25 of 30