W9425G6JH_13 Datasheet, PDF (41/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
12.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) tRCD/RAP(min)  tRCD (READA)  tRAS (min) – (BL/2)  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: Aug. 27, 2013
Revision A03