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512Mb: 32 Meg x 16, 16 Meg x 32 Mobile SDRAM
PRECHARGE Operation
Figure 44: WRITE Without Auto Precharge
CLK
T0
tCKS
tCKH
tCK
T1
tCL
T2
tCH
T3
T4
T5
T6
T7
T8
T9
CKE
tCMS
tCMH
Command
ACTIVE
NOP
WRITE
NOP
NOP
NOP
NOP
PRECHARGE
NOP
ACTIVE
tCMS tCMH
DQM
tA S
tAH
Address
A10
Row
tA S
tAH
Row
Column m
All banks
Row
Row
tA S
tAH
Disable auto precharge
Single bank
BA0, BA1
Bank
Bank
Bank
Bank
tD S
tDH
tD S
tDH
tD S
tDH
tD S
tDH
DQ
tRCD
D IN m
D IN m + 1
D IN m + 2
D IN m + 3
tWR
tRP
tRAS
tRC
Don’t Care
Note:
1. For this example, BL = 4 and the WRITE burst is followed by a manual PRECHARGE.
PDF: 09005aef8459c827
512mb_mobile_sdram_y67m_at.pdf – Rev. B 3/11 EN
73
Micron Technology, Inc. reserves the right to change products or specifications without notice.
? 2011 Micron Technology, Inc. All rights reserved.
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