參數(shù)資料
型號: ISP1520BD
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Hi-Speed Universal Serial Bus hub controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁數(shù): 40/51頁
文件大?。?/td> 259K
代理商: ISP1520BD
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Product data
Rev. 02 — 04 May 2004
40 of 51
9397 750 11689
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L.
Fig 14. Hub differential data delay and SOP distortion.
mgr777
SOP distortion:
t
SOP
= t
HDD (next J)
t
HDD(SOP)
(A) downstream hub delay
(B) upstream hub delay
upstream
differential
data lines
hub delay
downstream
t
HDD
hub delay
upstream
t
HDD
downstream
differential
data lines
downstream
differential
data
upstream
differential
data
crossover
point
crossover
point
crossover
point
crossover
point
+
3.3 V
0 V
+
3.3 V
0 V
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L.
Fig 15. Hub EOP delay and EOP skew.
mgr778
t
EOP+
t
EOP
t
EOP+
t
EOP
crossover
point
extended
crossover
point
extended
EOP delay:
t
EOP
= max (t
EOP
, t
EOP+
)
EOP delay relative to t
HDD
:
t
EOPD
= t
EOP
t
HDD
EOP skew:
t
HESK
= t
EOP+
t
EOP
(A) downstream EOP delay
(B) upstream EOP delay
upstream
differential
data lines
downstream
port
crossover
point
extended
crossover
point
extended
upstream
end of cable
downstream
differential
data lines
+
3.3 V
0 V
+
3.3 V
0 V
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