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W631GG6KB
8.13.2 READ Timing Definitions
Read timing is shown in Figure 23 and is applied when the DLL is enabled and locked.
Rising data strobe edge parameters:
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t DQSCK min/max describes the allowed range for a rising data strobe edge relative to CK, CK#.
t DQSCK is the actual position of a rising strobe edge relative to CK, CK#.
t QSH describes the DQS, DQS# differential output high time.
t DQSQ describes the latest valid transition of the associated DQ pins.
t QH describes the earliest invalid transition of the associated DQ pins.
Falling data strobe edge parameters:
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t QSL describes the DQS, DQS# differential output low time.
t DQSQ describes the latest valid transition of the associated DQ pins.
t QH describes the earliest invalid transition of the associated DQ pins.
t DQSQ ; both rising/falling edges of DQS, no t AC defined.
CK#
CK
t DQSCK(min)
t DQSCK(min)
DQS#
DQS
t DQSCK(max)
Rising Strobe
Region
t DQSCK
t QSH
t QH
t DQSQ
t DQSCK(max)
Rising Strobe
Region
t DQSCK
t QSL
t QH
t DQSQ
Associated
DQ Pins
Figure 23 – READ Timing Definition
Publication Release Date: Dec. 09, 2013
Revision A05
- 44 -
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