w9425g8eh Winbond Electronics Corp America, w9425g8eh Datasheet - Page 42

• Manufacturer Part Number: w9425g8eh
• Description: 8m ? 4 Banks ? 8 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
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.
/
RAP(min)
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
CK
Q1
Q1
Q1
Q2
Q2
RAS
Q3
Q3
AP
AP
AP
Publication Release Date: Jul. 04
(min) has command.
Q4
Q5
t
RP
Q6
Q7
ACT
ACT
ACT
Revision A01
,
2008