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RMLD232UAW датащи(PDF) 20 Page - Emerging Memory & Logic Solutions Inc

номер детали RMLD232UAW
подробное описание детали  2M x 32 bit Low Power DDR SDRAM
PDF  50 Pages
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производитель  EMLSI [Emerging Memory & Logic Solutions Inc]
домашняя страница  http://www.emlsi.com
Logo EMLSI - Emerging Memory & Logic Solutions Inc

RMLD232UAW датащи(HTML) 20 Page - Emerging Memory & Logic Solutions Inc

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20
Rev 0.7
64Mb Low Power DDR SDRAM
Advanced
Read with Auto Precharge
If a read with auto-precharge command is issued, the DDR SDRAM automatically enters the precharge operation BL/2 clock later
from a read with auto-precharge command when tRAS(min) is satisfied. If not, the start point of precharge operation will be delayed
until tRAS(min) is satisfied. Once the precharge operation has started, the bank cannot be reactivated and the new command can not
be asserted until the precharge time(tRP) has been satisfied.
*NOTE :
1. The row active command of the precharge bank can be issued after tRP from this point.
The new read/write command of other activated bank can be issued from this point.
At burst read/write with auto precharge, CAS interrupt of the same bank is illegal.
0
1
2
3
4
5
6
7
8
9
10
11
CK
CK
NOP
READ A
NOP
NOP
DQS
DQs
Figure.14 Read with auto precharge timing
NOP
BANK A
NOP
NOP
NOP
NOP
NOP
NOP
ACTIVE
Auto Precharge
Dout 0 Dout 1 Dout 2 Dout 3
tRP
*Bank can be reactivated at
completion of tRP
Auto-Precharge starts*1
tRAS(min)
CAS Latency=3
< Burst Length=4, CAS Latency=3 >
Command



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