128Mb: x32 SDRAM
READ Operation
Figure 24: READ – DQM Operation
T0
CLK
tCKS tCKH
CKE
tCMS tCMH
Command
ACTIVE
DQM
tAS tAH
Address
Row
tAS tAH
A10
BA0, BA1
Row
tAS tAH
Bank
T1
tCK
NOP
T2
tCL
tCH
READ
tCMS tCMH
Column m
Enable auto precharge
Disable auto precharge
Bank
T3
NOP
T4
NOP
DQ
tRCD
CL = 2
tAC
tLZ
tOH
DOUT
tHZ
T5
T6
NOP
NOP
tAC
tLZ
tAC
tOH
DOUT
Note: 1. For this example, BL = 4 and CL = 2.
T7
NOP
tOH
DOUT
tHZ
T8
NOP
Don’t Care
Undefined
PDF: 09005aef80872800
128mb_x32_sdram.pdf - Rev. U 04/13 EN
51
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