參數(shù)資料
型號(hào)： HY5DU121622C
廠商： Hynix Semiconductor Inc.
英文描述： 512Mb DDR SDRAM
中文描述： 產(chǎn)品512Mb DDR SDRAM
文件頁(yè)數(shù)： 17/31頁(yè)
文件大小： 253K
代理商： HY5DU121622C
Rev. 1.0 / Mar. 2005
17
1
HY5DU12422C(L)TP
HY5DU12822C(L)TP
HY5DU121622C(L)TP
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
0
Enable
1
Disable
BA0
MRS Type
0
MRS
1
EMRS
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
0
Valid
Normal Operation
_
_
All other states reserved
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