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H5DU2562GTR Datasheet(PDF) 16 Page - Hynix Semiconductor

Part No. H5DU2562GTR
Description  256Mb DDR SDRAM
Download  28 Pages
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Maker  HYNIX [Hynix Semiconductor]
Homepage  http://www.skhynix.com/kor/main.do
Logo HYNIX - Hynix Semiconductor

H5DU2562GTR Datasheet(HTML) 16 Page - Hynix Semiconductor

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Rev. 1.1 / Sep. 2009
16
H5DU2562GTR
H5DU2582GTR
EXTENDED MODE REGISTER SET (EMRS)
The Extended Mode Register controls functions beyond those controlled by the Mode Register; these additional func-
tions include DLL enable/disable, output driver strength selection(optional). These functions are controlled via the bits
shown below. The Extended Mode Register is programmed via the Mode Register Set command (BA0=1 and BA1=0)
and will retain the stored information until it is programmed again or the device loses power.
The Extended Mode Register must be loaded when all banks are idle and no bursts are in progress, and the controller
must wait the specified time before initiating any subsequent operation. Violating either of these requirements will
result in unspecified operation.
BA1
BA0
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
1
Operating Mode
0*
DS
DLL
A0
DLL enable
0Enable
1Disable
BA0
MRS Type
0MRS
1EMRS
A1
Output Driver
Impedance Control
0
Full Strength Driver
1
Half Strength Driver
* This part do not support/QFC function, A2 must be programmed to Zero.
An~A3
A2~A0
Operating Mode
0Valid
Normal Operation
__
All other states reserved


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