W9425G6JH_13 Datasheet, PDF (40/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
12.8 Auto-precharge Timing (Read Cycle, CL = 2)
1) tRCD (READA)  tRAS (MIN) – (BL/2)  tCK
CLK
CLK
BL=2
CMD
ACT
tRAS
tRP
READA
AP
ACT
DQS
DQ
BL=4
CMD
ACT
DQS
DQ
BL=8
CMD
ACT
DQS
DQ
READA
Q0 Q1
AP
ACT
READA
Q0 Q1 Q2 Q3
AP
ACT
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Notes: CL=2 shown; same command operation timing with CL = 2,5 and CL=3
In this case, the internal precharge operation begin after BL/2 cycle from READA 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