W9725G6KB25I-TR Datasheet, PDF (81/87 Pages) Winbond – 4M X 4 BANKS X 16 BIT DDR2 SDRAM

W9725G6KB
11.23 Burst read operation with Auto-precharge: RL=4 (AL=1, CL=3, BL=4, tRTP
> 2clks)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CLK/CLK
CMD
Post CAS
READA
A10 = 1
NOP
NOP
≥ AL + tRTP + tRP
NOP
DQS,
DQS
DQ's
AL = 1
RL = 4
CL = 3
NOP
NOP
NOP
Dout Dout Dout Dout
A0
A1
A2
A3
4-bit prefetch
tRTP
tRP
Precharge begins here
Bank A
Activate
NOP
11.24 Burst read with Auto-precharge followed by an activation to the same
bank (tRC Limit): RL=5 (AL=2, CL=3, internal tRCD=3, BL=4, tRTP ≤ 2clks)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CLK/CLK
CMD
DQS,
DQS
DQ's
Post CAS
READA
A10 = 1
NOP
NOP
NOP
NOP
NOP
≥ tRAS min. (AL + BL/2)
Auto-precharge begins
NOP
NOP
AL = 2
CL = 3
RL = 5
tRC min.
≥ tRP
Dout Dout Dout Dout
A0 A1 A2 A3
Bank A
Activate
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Publication Release Date: Sep. 03, 2012
Revision A03