W631GG6KB-15 Datasheet, PDF (43/158 Pages) Winbond – Double Data Rate architecture: two data transfers per clock cycle

W631GG6KB
7.13.2 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:
 tDQSCK min/max describes the allowed range for a rising data strobe edge relative to CK, CK#.
 tDQSCK is the actual position of a rising strobe edge relative to CK, CK#.
 tQSH describes the DQS, DQS# differential output high time.
 tDQSQ describes the latest valid transition of the associated DQ pins.
 tQH describes the earliest invalid transition of the associated DQ pins.
Falling data strobe edge parameters:
 tQSL describes the DQS, DQS# differential output low time.
 tDQSQ describes the latest valid transition of the associated DQ pins.
 tQH describes the earliest invalid transition of the associated DQ pins.
tDQSQ; both rising/falling edges of DQS, no tAC defined.
CK#
CK
tDQSCK(min)
tDQSCK(min)
tDQSCK(max)
tDQSCK(max)
Rising Strobe
Region
tDQSCK
tQSH
DQS#
Rising Strobe
Region
tDQSCK
tQSL
DQS
tQH
tDQSQ
tQH
tDQSQ
Associated
DQ Pins
Figure 23 – READ Timing Definition
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Publication Release Date: Feb. 27, 2013
Revision A04