HY5DU323222QP Datasheet, PDF (20/29 Pages) Hynix Semiconductor – 32M(1Mx32) DDR SDRAM

11HY5DU323222QP
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 A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
1
RFU*
DS
RFU*
DS
DLL
BA0
0
1
MRS Type
MRS
EMRS
A0
DLL enable
0
Enable
1
Disable
A6
A1
Output Driver Impedance Control
0
0
RFU*
0
1
Half
1
0
RFU*
1
1
Mached Impedance (Weak)
Rev. 0.3 / Jun. 2005
20