MT9HTF6472AY-800D1 Micron Technology Inc, MT9HTF6472AY-800D1 Datasheet - Page 23

• Manufacturer Part Number: MT9HTF6472AY-800D1
• Description: MODULE DDR2 512MB 240-DIMM
• Manufacturer: Micron Technology Inc

Specifications of MT9HTF6472AY-800D1

• Memory Type: DDR2 SDRAM
• Memory Size: 512MB
• Speed: 800MT/s
• Package / Case: 240-DIMM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Extended Mode Register 3 (EMR3)
Figure 11:
pdf: 09005aef80e6f860, source: 09005aef80e5b799
HTF9C32_64_128x72AG_2.fm - Rev. C 6/05 EN
Extended Mode Register 3 (EMR3) Definition
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,
Extended Mode Register 3 (EMR3) Definition. The EMR3 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.
256MB Address Bus
512MB Address Bus
1GB Address Bus
0*
BA2
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
EMR3
BA1
15
256MB, 512MB, 1GB (x72, SR, ECC) 240-Pin DDR2 SDRAM UDIMM
EMR3
0
0
1
1
14
BA1
14
BA0
14
EMR3 0* 0*
E14
BA0
0
1
0
1
0*
13
13
0*
BA0
A13
13
A13
Extended Mode Register (EMR2)
Extended Mode Register (EMR3)
Extended Mode Register (EMR)
0* 0*
12
12
0* 0*
A12 A11
A12 A11
12
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
A9
A9
9
A9
8
8
A8
A8
8
A8
7
7
A7 A6 A5 A4 A3
A7 A6 A5 A4 A3
7
A7 A6 A5 A4 A3
6
6
6
5
5
* E16 and E13 (A13) - E0 (A0) are reserved for future
5
23
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 3 (EMR3)
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t
MRD before initiating any sub-