參數(shù)資料
型號: MT18HVF6472PY-53EXX
元件分類: DRAM
英文描述: 64M X 72 DDR DRAM MODULE, 0.5 ns, DMA240
封裝: LEAD FREE, DIMM-240
文件頁數(shù): 16/47頁
文件大小: 1012K
代理商: MT18HVF6472PY-53EXX
PDF: 09005aef81c753e1/ Source: 09005aef81c753af
Micron Technology, Inc., reserves the right to change products or specifications without notice.
HVF18C64_128_256x72G_2.fm - Rev. A 8/05 EN
23
2003 Micron Technology, Inc. All rights reserved.
512MB, 1GB, 2GB: (x72, SR) 240-Pin DDR2 VLP RDIMM
Extended Mode Register 3 (EMR3)
The Extended Mode Register 3 (EMR3) controls functions beyond those controlled by
the mode register. Currently all bits in EMR3 are reserved as shown in Figure 11,
via the LOAD MODE command and will retain the stored information until it is pro-
grammed again or the device loses power. Reprogramming the extended mode register
will not alter the contents of the memory array, provided it is performed correctly.
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 tMRD before initiating any sub-
sequent operation. Violating either of these requirements could result in unspecified
operation.
Figure 11:
Extended Mode Register 3 (EMR3) Definition
A9
A7 A6 A5 A4 A3
A8
A2
A1 A0
Extended Mode
Register (Ex)
Address Bus
97
6
5
4
3
82
1
0
A10
A12 A11
BA0
BA1
10
11
12
13
* E12 (A12)–E0 (A0) are reserved for future use and must all be programmed to '0.'
14
EMR3 0* 0*
0*
0* 0* 0* 0* 0* 0* 0* 0*
0* 0*
A9
A7 A6 A5 A4 A3
A8
A2
A1 A0
Extended Mode
Register (Ex)
Address Bus
97
6
5
4
3
82
1
0
A10
A12 A11
BA0
BA1
10
11
12
13
0*
14
15
A13
EMR3
0*
0* 0* 0* 0* 0* 0* 0* 0*
0* 0*
512MB Address Bus
1GB Address Bus
A9
A7 A6 A5 A4 A3
A8
A2
A1 A0
Extended Mode
Register (Ex)
Address Bus
97
6
5
4
3
82
1
0
A10
A12 A11
BA0
BA1
10
11
12
13
0*
14
15
A13
0
1
0
1
Mode Register Set
Mode Register Set (MRS)
Extended Mode Register (EMR)
Extended Mode Register (EMR2)
Extended Mode Register (EMR3)
E15
0
0
1
E14
EMR3
0*
0* 0* 0* 0* 0* 0* 0* 0*
0* 0*
* E16 and E13 (A13) - E0 (A0) are reserved for future
use and must all be programmed to '0'.
BA2
16
0*
* E13 (A13)–E0 (A0) are reserved for future use and must all be programmed to '0.'
2GB Address Bus
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