hy5du281622ftp Hynix Semiconductor, hy5du281622ftp Datasheet - Page 15

• Manufacturer Part Number: hy5du281622ftp
• Description: 128mb Ddr Sdram
• Manufacturer: Hynix Semiconductor

Rev. 1.0 /June 2008
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.
* This part do not support/QFC function, A2 must be programmed to Zero.
BA1 BA0 A11
0
BA0
0
1
1
MRS Type
An~A3
EMRS
MRS
0
_
A10
A2~A0
A9
Valid
_
A8
Operating Mode
All other states reserved
A7
Operating Mode
Normal Operation
A6
A5
A4
A3
HY5DU281622FT(P) Series
A2
0*
A1
0
1
A1
DS
Impedance Control
Half Strength Driver
Full Strength Driver
Output Driver
DLL
A0
A0
0
1
DLL enable
Disable
Enable
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