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W9425G6EH
11.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) t RCD/RAP(min) ≤ t RCD (READA) < t RAS (min) – (BL/2) × t CK
BL=2
CLK
CLK
t RAS
t RP
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
BL=4
DQ
Q0
Q1
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
DQ
Q0
Q1
Q2
Q3
BL=8
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
DQ
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 t RAS (min) has command.
AP
Represents the start of internal precharging.
The Read with Auto-precharge command cannot be interrupted by any other command.
Publication Release Date:Dec. 03, 2008
- 43 -
Revision A08
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