參數(shù)資料
型號(hào): USS820D-DB
英文描述: USS-820D USB Device Controller
中文描述: 號(hào)- 820D USB設(shè)備控制器
文件頁數(shù): 11/58頁
文件大?。?/td> 868K
代理商: USS820D-DB
Agere Systems Inc.
11
Data Sheet, Rev. 4
June 2001
USB Device Controller
USS-820D
Register Timing Characteristics
(continued)
Table 5. Register Access Timing—Special Function Register (SFR) Write
5-5353
Figure 7. Register Access Timing—SFR Write
Symbol
tWRASU
Parameter
Min
60
Unit
ns
Write Address Setup Time (starts
before
the
trailing
edge of WRN or
IOCSN, whichever is
first
)
Write Address Hold (starts
after
the
trailing
edge of WRN or IOCSN,
whichever is
first
)
Write Minimum Pulse Width (from the
leading
edge of WRN or IOCSN,
whichever is
last
, to the
trailing
edge of WRN or IOCSN, whichever is
first
)
Write Data Setup (from data valid to the
trailing
edge of WRN or IOCSN,
whichever is
first
)
Write Data Hold (from the
trailing
edge of WRN or IOCSN, whichever is
first
, to data not valid)
Recovery Time Between Write Attempts (from the
trailing
edge of WRN
or IOCSN, whichever is
first
, to the next
leading
edge of WRN or IOCSN,
whichever is
last
)
Recovery Time Between Write Completes (from the
trailing
edge of WRN
or IOCSN, whichever is
first
, to the next
trailing
edge of WRN or IOCSN,
whichever is
first
)
tWRAHD
10
ns
tWRPW
23
ns
tWRDSU
60
ns
tWRDHD
10
ns
tWRREC
23
ns
tWRRECC
86
ns
IOCSN
WRN
A
D
tWRRECC
tWRPW
tWRASU
tWRAHD
tWRDSU
VALID
VALID
VALID
VALID
tWRDHD
tWRREC
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