W9425G8EH Datasheet, PDF (42/53 Pages) Winbond – 8M × 4 BANKS × 8 BITS DDR SDRAM

W9425G8EH
11.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) tRCD/RAP(min) ≤ tRCD (READA) < tRAS(min) – (BL/2) × tCK
CLK
tRAS
CLK
BL=2
CMD
DQS
ACT
tRAP
tRCD
READA
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: Jul. 04, 2008
Revision A01