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(yè)數(shù): 10/58頁(yè)
文件大小: 868K
代理商: USS820D-DB
10
Agere Systems Inc.
Data Sheet, Rev. 4
June 2001
USB Device Controller
USS-820D
Register Timing Characteristics
(continued)
Table 4. Register Access Timing—Special Function Register (SFR) Read
5-5352
Figure 6. Register Access Timing—SFR Read
Symbol
tRDASU
Parameter
Min
60
Max
Unit
ns
Read Address Setup Time (starts
before
the
trailing
edge of RDN
or IOCSN, whichever is
first
)
Read Address Hold (starts
after
the
trailing
edge of RDN or
IOCSN, whichever is
first
):
Operational
Suspended
Read Data Valid (from the
leading
edge of RDN or IOCSN or from
address valid, whichever is
last
, to data valid):
Operational
Suspended
Read Data to Z State (starts
after
the
trailing
edge of RDN or
IOCSN, whichever is
first
)
Recovery Time Between Reads (from the
trailing
edge of RDN or
IOCSN, whichever is
first
, to the next
leading
edge of RDN or
IOCSN, whichever is
last
)
Recovery Time Between Consecutive RXDAT Reads (from the
trailing
edge of RDN or IOCSN, whichever is
first
, to the next
trailing
edge of RDN or IOCSN, whichever is
first
)
Minimum Pulse Width (from the
leading
edge of RDN or IOCSN,
whichever is
last
, to the
trailing
edge of RDN or IOCSN, which-
ever is
first
)
tRDAHD
10
1
ns
ns
tRDDV1,
tRDDV2
2
74
33
32
ns
ns
ns
tRDDZ
tRDREC
23
ns
tRDRECRXD
86
ns
tRDPW
23
ns
tRDDV2
IOCSN
RDN
A
D
tRDREC
tRDPW
tRDASU
tRDAHD
tRDDV1
VALID
VALID
tRDDZ
VALID
HIGH IMPEDANCE
VALID
tRDRECRXD
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