W9425G8EH Datasheet, PDF (41/53 Pages) Winbond – 8M × 4 BANKS × 8 BITS DDR SDRAM

W9425G8EH
11.8 Auto-precharge Timing (Read Cycle, CL = 2)
1) tRCD (READA) ≥ tRAS(min) – (BL/2) × tCK
CLK
CLK
BL=2
CMD
ACT
DQS
tRAS
tRP
READA
AP
ACT
DQ
BL=4
CMD
ACT
DQS
DQ
BL=8
CMD
ACT
DQS
DQ
READA
Q0 Q1
AP
ACT
READA
Q0 Q1 Q2 Q3
AP
ACT
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Notes: CL=2 shown; same command operation timing with CL = 2.5 and CL=3
In this case, the internal precharge operation begin after BL/2 cycle from READA 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