參數(shù)資料
型號(hào): UPD720122
廠商: NEC Corp.
英文描述: MOS Integrated Circuit
中文描述: 馬鞍山集成電路
文件頁數(shù): 68/82頁
文件大?。?/td> 650K
代理商: UPD720122
Data Sheet S16685EJ2V0DS
68
μ
PD720122
(1) Power-on and connection events
Figure 2-8. Power-on and Connection Event Timing
t1
100 ms
T
SIGATT
4.01 V
D+
or
D
100 ms
T
ATTDB
Hub port
power-on
Hub port
power OK
Attach detected
t4
t5
USB system software
reads device speed
V
IH
(min)
10 ms
Reset recovery
time
t6
V
BUS
V
IH
(2) USB signals
Figure 2-9. USB Differential Data Jitter for Full-Speed
T
PERIOD
Differential
data lines
Crossover
points
Paired
transitions
N * T
PERIOD
+ T
xDJ2
Consecutive
transitions
N * T
PERIOD
+ T
xDJ1
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