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W972GG6JB-25 Datasheet(PDF) 52 Page - Winbond

Part No. W972GG6JB-25
Description  Double Data Rate architecture: two data transfers per clock cycle
Download  87 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W972GG6JB-25 Datasheet(HTML) 52 Page - Winbond

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W972GG6JB
Publication Release Date: Nov. 29, 2011
- 52 -
Revision A02
-
tJIT(duty)
tJIT(duty) is defined as the cumulative set of tCH jitter and tCL jitter. tCH jitter is the largest deviation of any single tCH from
tCH(avg). tCL jitter is the largest deviation of any single tCL from tCL(avg).
tJIT(duty) = Min/max of {tJIT(CH), tJIT(CL)}
where,
tJIT(CH) = {tCHi- tCH(avg) where i=1 to 200}
tJIT(CL) = {tCLi- tCL(avg) where i=1 to 200}
-
tJIT(per), tJIT(per,lck)
tJIT(per) is defined as the largest deviation of any single tCK from tCK(avg).
tJIT(per) = Min/max of {tCKi- tCK(avg) where i=1 to 200}
tJIT(per) defines the single period jitter when the DLL is already locked.
tJIT(per,lck) uses the same definition for single period jitter, during the DLL locking period only.
tJIT(per) and tJIT(per,lck) are not guaranteed through final production testing.
-
tJIT(cc), tJIT(cc,lck)
tJIT(cc) is defined as the difference in clock period between two consecutive clock cycles:
tJIT(cc) = Max of |tCKi+1
– tCKi|
tJIT(cc) defines the cycle to cycle jitter when the DLL is already locked.
tJIT(cc,lck) uses the same definition for cycle to cycle jitter, during the DLL locking period only.
tJIT(cc) and tJIT(cc,lck) are not guaranteed through final production testing.
-
tERR(2per), tERR (3per), tERR (4per), tERR (5per), tERR (6-10per) and tERR (11-50per)
tERR is defined as the cumulative error across multiple consecutive cycles from tCK(avg).
tERR(nper) =

1
1
n
i
j
j
tCK
–n × tCK(avg)
Where
50per)
R(11
for
tER
50
n
11
10per)
R(6
for
tER
10
n
6
R(5per)
for
tER
5
=
n
R(4per)
for
tER
4
=
n
R(3per)
for
tER
3
=
n
R(2per)
for
tER
2
=
n


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