參數(shù)資料
型號: AT43301-AC
廠商: ATMEL CORP
元件分類: 總線控制器
英文描述: Low-cost USB Hub Controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP32
封裝: 7 X 7 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, PLASTIC, MS-026BBA, LQFP-32
文件頁數(shù): 19/27頁
文件大?。?/td> 206K
代理商: AT43301-AC
19
1137J–USB–01/06
AT43301
Figure 4-8.
Hub EOP Delay and EOP Skew
EOP Delay:
T
EOPD
= T
EOP
- T
HDDX
EOP Skew:
T
HESK
= T
EOP +
-T
EOP-
Low-speed timings are determined in the same way for:
T
LEOPD
and T
LHESK
CROSSOVER
POINT
EXTENDED
DOWNSTREAM
PORT
A. DOWNSTREAM EOP DELAY WITH CABLE
50% POINT OF
INITIAL SWING
UPSTREAM
END OF
CABLE
UPSTREAM
PORT
V
SS
V
SS
V
SS
V
SS
B. DOWNSTREAM EOP DELAY WITHOUT CABLE
DOWNSTREAM
PORT
UPSTREAM
PORT OR END
OF CABLE
V
SS
V
SS
C. UPSTREAM EOP DELAY WITH OR WITHOUT CABLE
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
DOWNSTREAM
PORT
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
CROSSOVER
POINT
EXTENDED
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
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