w9425g6eb Winbond Electronics Corp America, w9425g6eb Datasheet - Page 39

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

11.8 Auto-precharge Timing (Read Cycle, CL = 2)
1) t
Notes: CL=2 shown; same command operation timing with CL = 2,5 and CL=3
BL=2
BL=4
BL=8
RCD
CMD
DQS
CMD
DQS
CMD
DQS
CLK
CLK
DQ
DQ
In this case, the internal precharge operation begin after BL/2 cycle from READA command.
The Read with Auto-precharge command cannot be interrupted by any other command.
DQ
(READA) ≥ t
AP
Represents the start of internal precharging.
ACT
ACT
ACT
RAS (MIN)
– (BL/2) × t
READA
CK
t
RAS
READA
- 39 -
Q0
Q1
READA
Q2
Q3
Publication Release Date:Feb. 12, 2009
AP
AP
AP
Q0
Q4
Q1
Q5
tRP
Q0
Q2
Q6
W9425G6EB
Q1
Q3
Q7
ACT
ACT
ACT
Revision A02