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RMLD232UAW Datasheet(PDF) 19 Page - Emerging Memory & Logic Solutions Inc

Part # RMLD232UAW
Description  2M x 32 bit Low Power DDR SDRAM
PDF  50 Pages
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Manufacturer  EMLSI [Emerging Memory & Logic Solutions Inc]
Direct Link  http://www.emlsi.com
Logo EMLSI - Emerging Memory & Logic Solutions Inc

RMLD232UAW Datasheet(HTML) 19 Page - Emerging Memory & Logic Solutions Inc

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19
Rev 0.7
64Mb Low Power DDR SDRAM
Advanced
DM masking
The DDR SDRAM has a data mask function that can be used in conjunction with data write cycle, not read cycle. When the data
mask is activated (DM high) during write operation, DDR SDRAM does not accept the corresponding data.(DM to data-mask latency
is zero).
DM must be issued at the rising or falling edge of data strobe.
0
1
2
3
4
5
6
7
8
CK
CK
Command
NOP
NOP
NOP
NOP
DQS
DQs
Figure.13 DM masking timing
< Burst Length=8 >
NOP
WRITE
NOP
NOP
NOP
Din 0 Din 1
Din 3
Din 2
Din 5
Din 4
Din 6 Din 7
tDQSSmax
tWPRES tWPREH
masked by DM=H
DM



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