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W9425G6KH-5-TR Datasheet, PDF (41/52 Pages) Winbond – 4 M 4 BANKS 16 BITS DDR SDRAM | |||
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W9425G6KH
12.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) tRCD/RAP(min) ⤠tRCD (READA) < tRAS (min) â (BL/2) ï´ tCK
CLK
CLK
BL=2
CMD
DQS
ACT
tRAP
tRCD
READA
tRAS
tRP
AP
ACT
DQ
BL=4
CMD
DQS
ACT
tRAP
tRCD
READA
DQ
BL=8
CMD
DQS
ACT
tRAP
tRCD
READA
DQ
Q0 Q1
AP
ACT
Q0 Q1 Q2 Q3
AP
ACT
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Notes: CL2 shown; same command operation timing with CL = 2.5, CL=3.
In this case, the internal precharge operation does not begin until after tRAS (min) has command.
AP Represents the start of internal precharging.
The Read with Auto-precharge command cannot be interrupted by any other command.
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Publication Release Date: Nov. 17, 2014
Revision: A02
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