hy5du573222afm Hynix Semiconductor, hy5du573222afm Datasheet - Page 20

• Manufacturer Part Number: hy5du573222afm
• Description: 256m 8mx32 Gddr Sdram
• Manufacturer: Hynix Semiconductor

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.
Rev. 0.5 / Aug. 2003
BA1
0
* All bits in RFU address fields must be programmed to Zero, all other states are reserved for future usage.
BA0
BA0
0
1
1
A11
MRS Type
EMRS
MRS
A10
RFU*
A9
A8
A7
DS
A6
A5
RFU*
A2
A4
0
0
0
0
1
1
1
1
A6
0
0
1
1
0
0
1
1
A3
A1
0
1
0
1
0
1
0
1
DS
A2
Output Driver Impedance Control
A1
DS
Semi Weak (30%)
Semi Half (50%)
DLL
A0
A0
0
1
Weak (40%)
Half (60%)
RFU*
RFU*
RFU*
RFU*
HY5DU573222AFM
DLL enable
Enable
Diable
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