MT47H256M4B7-37E:A Micron Technology Inc, MT47H256M4B7-37E:A Datasheet - Page 84
![IC DDR2 SDRAM 1GBIT 92FBGA](/photos/7/26/72643/557-92-fbga_sml.jpg)
MT47H256M4B7-37E:A
Manufacturer Part Number
MT47H256M4B7-37E:A
Description
IC DDR2 SDRAM 1GBIT 92FBGA
Manufacturer
Micron Technology Inc
Datasheet
1.MT47H256M4HQ-5EE_TR.pdf
(131 pages)
Specifications of MT47H256M4B7-37E:A
Format - Memory
RAM
Memory Type
DDR2 SDRAM
Memory Size
1G (256M x 4)
Speed
3.75ns
Interface
Parallel
Voltage - Supply
1.7 V ~ 1.9 V
Operating Temperature
0°C ~ 85°C
Package / Case
92-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MT47H256M4B7-37E:A
Manufacturer:
Micron Technology Inc
Quantity:
10 000
Company:
Part Number:
MT47H256M4B7-37E:A TR
Manufacturer:
Micron Technology Inc
Quantity:
10 000
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Extended Mode Register 3 (EMR3)
Figure 41: EMR3 Definition
PDF: 09005aef821ae8bf
1GbDDR2.pdf – Rev. T 02/10 EN
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 41. The
EMR3 is programmed via the LM command and will retain the stored information until
it is programmed again or until 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 an unspecified operation.
E15
BA2
16
0
0
1
1
0
1. E16 (BA2) is only applicable for densities ≥1Gb, is reserved for future use, and must be
2. Mode bits (En) with corresponding address balls (An) greater than E12 (A12) are re-
1
E14
BA1
15
0
1
0
1
MRS
programmed to “0.”
served for future use and must be programmed to “0.”
BA0
14
Extended mode register (EMR2)
Extended mode register (EMR3)
Extended mode register (EMR)
0
n
An
Mode register (MR)
Mode Register Set
2
0
12
A12 A11
0
11
0
10
A10
0
9
A9
0
8
A8
0
7
A7 A6 A5 A4 A3
0
6
0
5
84
0
4
0
3
0
2
A2 A1 A0
0
Micron Technology, Inc. reserves the right to change products or specifications without notice.
t
1
MRD before initiating any subsequent opera-
Extended Mode Register 3 (EMR3)
0
0
Address bus
Extended mode
register (Ex)
1Gb: x4, x8, x16 DDR2 SDRAM
© 2004 Micron Technology, Inc. All rights reserved.
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