hy5du561622ct Hynix Semiconductor, hy5du561622ct Datasheet - Page 20

• Manufacturer Part Number: hy5du561622ct
• Description: 256m 16mx16 Gddr Sdram
• Manufacturer: Hynix Semiconductor

Rev. 1.3 / Feb. 2006
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
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
A12
MRS Type
EMRS
MRS
A11
A10
RFU*
A9
A8
A7
A6
DS
A5
A4
A6
0
0
1
1
RFU*
A3
A1
0
1
0
1
Output Driver Impedance Control
A2
Matched Impedance (Weak)
DS
A1
1HY5DU561622CT
RFU*
A0
DLL
Half
0
1
Full
A0
DLL enable
Enable
Diable
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