w9425g6eb Winbond Electronics Corp America, w9425g6eb Datasheet - Page 40

• Manufacturer Part Number: w9425g6eb
• Description: 4 M ? 4 Banks ? 16 Bits Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

11.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) t
Notes: CL2 shown; same command operation timing with CL = 2.5, CL=3.
RCD/RAP(min)
BL=2
BL=4
BL=8
In this case, the internal precharge operation does not begin until after t
The Read with Auto-precharge command cannot be interrupted by any other command.
AP
CMD
CMD
DQS
CMD
DQS
CLK
CLK
DQ
DQ
DQS
DQ
Represents the start of internal precharging.
≤ t
ACT
ACT
ACT
RCD
(READA) < t
t
t
t
t
t
t
RCD
RCD
RCD
RAP
RAP
RAP
READA
READA
READA
RAS (min)
t
RAS
– (BL/2) × t
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Q0
Q0
Q0
Q1
Q1
Q1
CK
Q2
Q2
RAS
Q3
Q3
AP
AP
AP
Publication Release Date:Feb. 12, 2009
(min) has command.
Q4
Q5
t
RP
Q6
Q7
W9425G6EB
ACT
ACT
ACT
Revision A02