W631GG6KB-15 Datasheet, PDF (57/158 Pages) Winbond – Double Data Rate architecture: two data transfers per clock cycle

W631GG6KB
7.14.4 tWPRE Calculation
The method for calculating differential pulse widths for tWPRE is shown in Figure 41.
CK
VTT
CK#
t1
tWPRE_begin
DQS - DQS#
Resulting differential signal,
relevant for tWPRE specification
tWPRE
0V
t2
tWPRE_end
Figure 41 – Method for calculating tWPRE transitions and endpoints
7.14.5 tWPST Calculation
The method for calculating differential pulse widths for tWPST is shown in Figure 42.
CK
VTT
CK#
tWPST
DQS - DQS#
0V
Resulting differential signal,
t1
relevant for tWPST specification
tWPST_begin
t2
tWPST_end
Figure 42 – Method for calculating tWPST transitions and endpoints
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Publication Release Date: Feb. 27, 2013
Revision A04