MT9HTF6472AY-667D4 Micron Technology Inc, MT9HTF6472AY-667D4 Datasheet - Page 22

• Manufacturer Part Number: MT9HTF6472AY-667D4
• Description: MODULE DDR2 512MB 240-DIMM
• Manufacturer: Micron Technology Inc

Specifications of MT9HTF6472AY-667D4

• Memory Type: DDR2 SDRAM
• Memory Size: 512MB
• Package / Case: 240-DIMM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Speed: -
• Other names: 557-1303; MT9HTF6472AY-667D4

Extended Mode Register 2 (EMR2)
Figure 10:
pdf: 09005aef80e6f860, source: 09005aef80e5b799
HTF9C32_64_128x72AG_2.fm - Rev. C 6/05 EN
Extended Mode Register 2 (EMR2) Definition
The Extended Mode Register 2 (EMR2) controls functions beyond those controlled by
the mode register. Currently all bits in EMR2 are reserved as shown in Figure 10,
Extended Mode Register 2 (EMR2) Definition. The EMR2 is programmed via the LOAD
MODE command and will retain the stored information until it is programmed 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
sequent operation. Violating either of these requirements could result in unspecified
operation.
512MB Address Bus
256MB Address Bus
1GB Address Bus
BA2
0*
16
* E12 (A12)–E0 (A0) are reserved for future use and must all be programmed to '0.'
* E13 (A13)–E0 (A0) are reserved for future use and must all be programmed to '0.'
E15
BA1
15
EMR2
BA1
256MB, 512MB, 1GB (x72, SR, ECC) 240-Pin DDR2 SDRAM UDIMM
15
EMR2
0
0
1
1
14
BA1
BA0
14
14
EMR2 0* 0*
E14
BA0
0
1
0
1
0*
0*
13
13
BA0
13
A13
A13
Extended Mode Register (EMR2)
Extended Mode Register (EMR3)
Extended Mode Register (EMR)
0* 0*
0* 0*
12
12
12
A12 A11
A12 A11
Mode Register Set (MRS)
A12 A11
Mode Register Set
11
11
11
0*
0*
0*
10
10
10
A10
A10
A10
0* 0* 0* 0* 0* 0* 0* 0*
0* 0* 0* 0* 0* 0* 0* 0*
0* 0* 0* 0* 0* 0* 0* 0*
9
9
9
A9
A9
A9
8
8
A8
A8
8
A8
7
7
7
A7 A6 A5 A4 A3
A7 A6 A5 A4 A3
A7 A6 A5 A4 A3
6
6
6
* E16 and E13 (A13) - E0 (A0) are reserved for future
5
5
5
22
4
4
4
use and must all be programmed to '0'.
3
3
3
2
2
2
A2 A1 A0
A2 A1 A0
A2 A1 A0
0* 0*
0* 0*
0* 0*
1
1
1
Micron Technology, Inc., reserves the right to change products or specifications without notice.
0
0
0
Extended Mode
Register (Ex)
Extended Mode
Register (Ex)
Extended Mode
Register (Ex)
Address Bus
Address Bus
Address Bus
Extended Mode Register 2 (EMR2)
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MRD before initiating any sub-