128Mb: x32 SDRAM
PRECHARGE Operation
Figure 36: READ With Auto Precharge
T0
CLK
tCKS tCKH
CKE
Command
tCMS tCMH
ACTIVE
DQM
Address
A10
BA0, BA1
tAS tAH
Row
tAS tAH
Row
tAS tAH
Bank
T1
tCK
NOP
T2
tCL
tCH
READ
tCMS tCMH
Column m
Enable auto precharge
Bank
T3
NOP
DQ
tRCD
tRAS
tRC
CL = 2
tAC
tLZ
T4
T5
NOP
NOP
tAC
tOH
DOUT m
tAC
tOH
DOUT
m+1
Note: 1. For this example, BL = 4 and CL = 2.
T6
NOP
tAC
tOH
DOUT
m+2
tRP
T7
T8
NOP
ACTIVE
Row
tOH
DOUT
m+3
tHZ
Row
Bank
Don’t Care
Undefined
PDF: 09005aef80872800
128mb_x32_sdram.pdf - Rev. U 04/13 EN
63
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