mt47h128m16hg-3-it Micron Semiconductor Products, mt47h128m16hg-3-it Datasheet - Page 29

• Manufacturer Part Number: mt47h128m16hg-3-it
• Description: 2gb X4, X8, X16 Ddr2 Sdram
• Manufacturer: Micron Semiconductor Products

Extended Mode Register 3
Figure 15:
PDF: 09005aef824f87b6/Source: 09005aef824f1182
2gb_ddr2.fm - Rev. A 9/06 EN
Extended Mode Register 3 (EMR3) Definition
Notes:
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 15 on page 29.
The EMR3 is programmed via the LM command and will retain the stored information
until it is programmed again or the device loses power. Reprogramming the EMR will not
alter the contents of the memory array, provided it is performed correctly.
EMR3 must be loaded when all banks are idle and no bursts are in progress, and the
controller must wait the specified time
tion. Violating either of these requirements could result in unspecified operation.
1. E14 (A14)–E0 (A0) are reserved for future use and must all be programmed to “0.” A14 is
M17
0
0
0
0
not used in x16 configuration.
M16
0
0
1
1
M15
17
BA2
0
1
0
1
EMR2
16
Extended mode register (EMR2)
Extended mode register (EMR3)
BA1
Extended mode register (EMR)
15
Mode Register Definition
BA0
Mode register (MR)
0
14
1
A14
0
13
1
A13
0
12
1
A12 A11
0
11
1
0
10
1
A10
0
29
9
1
A9
0
1
8
A8
0
1
7
A7
0
1
6
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
A6 A5
MRD before initiating any subsequent opera-
0
1
5
0
1
4
A4 A3
0
1
3
2Gb: x4, x8, x16 DDR2 SDRAM
0
1
2
A2 A1 A0
0
1
1
Extended Mode Register 3
0
1
0
Extended Mode
Register (Ex)
Address Bus
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