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W631GG6KB
8.13.2.4 t RPRE Calculation
The method for calculating differential pulse widths for t RPRE is shown in Figure 27.
CK
V TT
CK#
t A
DQS
Single ended signal, provided
as background information
t C
DQS#
Single ended signal, provided
as background information
t1
t B
t D
V TT
V TT
t RPRE _begin
DQS - DQS#
Resulting differential signal,
relevant for t RPRE specification
t RPRE
t2
0
t RPRE _end
Figure 27 – Method for calculating t RPRE transitions and endpoints
8.13.2.5 t RPST Calculation
The method for calculating differential pulse widths for t RPST is shown in Figure 28.
CK
V TT
CK#
t A
DQS
Single ended signal, provided
as background information
DQS#
t C
t B
t D
V TT
V TT
Single ended signal, provided
as background information
t RPST
DQS - DQS#
Resulting differential signal,
relevant for t RPST specification
t1
t RPST _begin
0
t2
t RPST _end
Figure 28 – Method for calculating t RPST transitions and endpoints
Publication Release Date: Dec. 09, 2013
Revision A05
- 48 -
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