Atmel AT43301, Руководство пользователя

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AT43301
11
Note: 1. With 6.000 MHz, 100 ppm crystal.
Table 11. DPx, DMx Source Timings, Full Speed Operation
Symbol Parameter Condition Min Max Unit
t
DRATE
Full Speed Data Rate
(1)
Average bit rate 11.97 12.03 Mb/s
t
FRAME
Frame Interval
(1)
0.9995 1.0005 ms
t
RFI
Consecutive Frame Interval Jitter
(1)
No clock adjustment 42.0 ns
t
RFIADJ
Consecutive Frame Interval Jitter
(1)
With clock adjustment 126.0 ns
t
DJ1
t
DJ2
Source Diff Driver Jitter
To Next Transition
For Paired Transitions
-3.5
-4.0
3.5
4.0
ns
ns
t
FDEOP
Source Jitter for Differential Transition to SEO Transitions -2.0 5.0 ns
t
JR1
t
JR2
Recvr Data Jitter Tolerance
To Next Transition
For Paired Transitions
-18.5
-9.0
18.5
9.0
ns
ns
t
FEOPT
Source SEO interval of EOP 160.0 175.0 ns
t
FEOPR
Receiver SEO interval of EOP 82.0 ns
t
FST
Width of SEO interval during differential transition 14.0 ns
Table 12. DPx, DMx Driver Characteristics, Low-speed Operation
Symbol Parameter Condition Min Max Unit
t
R
Rise time C
L
= 200 - 600 pF 75.0 300.0 ns
t
F
Fall time C
L
= 200 - 600 pF 75.0 300.0 ns
t
RFM
t
R
/t
F
matching 80.0 125.0 %
Table 13. DPx, DMx Hub Timings, High-Speed Operation
Symbol Parameter Condition Min Max Unit
t
HDD2
Hub Differential Data Delay without Cable 44.0 ns
t
HDJ1
t
HDJ2
Hub Diff Driver Jitter
To Next Transition
For Paired Transitions
-3.0
-1.0
3.0
1.0
ns
ns
t
FSOP
Data Bit Width Distortion after SOP -5.0 5.0 ns
t
FEOPD
Hub EOP Delay Relative to t
HDD
0 15.0 ns
t
FHESK
Hub EOP Output Width Skew -15.0 15.0 ns