MT41J256M8HX-15E:D Micron Technology Inc, MT41J256M8HX-15E:D Datasheet - Page 137

• Manufacturer Part Number: MT41J256M8HX-15E:D
• Description: MICMT41J256M8HX-15E:D 2GB:X4,X8,X16 DDR3
• Manufacturer: Micron Technology Inc
• Type: DDR3 SDRAMr
• Series: -r

Specifications of MT41J256M8HX-15E:D

• Organization: 256Mx8
• Address Bus: 18b
• Maximum Clock Rate: 1.333GHz
• Operating Supply Voltage (typ): 1.5V
• Package Type: FBGA
• Operating Temp Range: 0C to 95C
• Operating Supply Voltage (max): 1.575V
• Operating Supply Voltage (min): 1.425V
• Supply Current: 165mA
• Pin Count: 78
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Format - Memory: RAM
• Memory Type: DDR3 SDRAM
• Memory Size: 2G (256M x 8)
• Speed: 667MHz
• Interface: Parallel
• Voltage - Supply: 1.425 V ~ 1.575 V
• Operating Temperature: 0°C ~ 95°C
• Package / Case: 78-TFBGA
• Lead Free Status / RoHS Status: Compliant

Mode Register 1 (MR1)
Figure 54: Mode Register 1 (MR1) Definition
DLL Enable/DLL Disable
PDF: 09005aef826aaadc
2Gb_DDR3_SDRAM.pdf – Rev. K 04/10 EN
M16
0
0
1
1
M15
0
1
0
1
Mode register set 0 (MR0)
Mode register set 1 (MR1)
Mode register set 2 (MR2)
Mode register set 3 (MR3)
Mode Register
Notes:
The mode register 1 (MR1) controls additional functions and features not available in
the other mode registers: Q OFF (OUTPUT DISABLE), TDQS (for the x8 configuration
only), DLL ENABLE/DLL DISABLE, R
CAS ADDITIVE latency, and OUTPUT DRIVE STRENGTH. These functions are control-
led via the bits shown in Figure 54 (page 137). The MR1 register is programmed via the
MRS command and retains the stored information until it is reprogrammed, until RE-
SET# goes LOW, or until the device loses power. Reprogramming the MR1 register will
not alter the contents of the memory array, provided it is performed correctly.
The MR1 register must be loaded when all banks are idle and no bursts are in progress.
The controller must satisfy the specified timing parameters
tiating a subsequent operation.
The DLL may be enabled or disabled by programming MR1[0] during the LOAD MODE
command, as shown in Figure 54 (page 137). The DLL must be enabled for normal oper-
ation. DLL enable is required during power-up initialization and upon returning to
normal operation after having disabled the DLL for the purpose of debugging or evalua-
tion. Enabling the DLL should always be followed by resetting the DLL using the
appropriate LOAD MODE command.
1. MR1[17, 14, 13, 10, 8] are reserved for future use and must be programmed to 0.
2. During write leveling, if MR1[7] and MR1[12] are 1, then all R
3. During write leveling, if MR1[7] is a 1, but MR1[12] is a 0, then only R
for use.
are available for use.
BA2
0
17
1
M9
0
0
0
0
1
1
1
1
M6
BA1
16
0
0
0
1
1
0
0
1
1
M12
0
1
M2
0
1
0
1
0
1
0
1
BA0
1
15
Disabled
Enabled
RZQ/2 (120Ω [NOM])
RZQ/12 (20Ω [NOM])
RZQ/4 (60Ω [NOM])
RZQ/6 (40Ω [NOM])
RZQ/8 (30Ω [NOM])
Q Off
0
A14
14
R
1
R
TT,nom
TT,nom
Non-Writes
0
Reserved
Reserved
13
A13
1
Q Off
disabled
M11
(ODT)
12
A12 A11
0
1
TDQS
11
Disabled
Enabled
2
TDQS
0
10
1
A10
RZQ/2 (120Ω [NOM])
RZQ/4 (60Ω [NOM])
RZQ/6 (40Ω [NOM])
137
R
R
R
TT,nom
TT
TT,nom
9
A9
Reserved
Reserved
Writes
0
n/a
n/a
1
8
A8
disabled
(ODT)
WL
7
A7 A6 A5 A4 A3
TT,nom
R
3
TT
6
Micron Technology, Inc. reserves the right to change products or specifications without notice.
ODS
5
M4
M7
0
0
1
1
0
1
value (ODT), WRITE LEVELING, POSTED
4
M3
AL
Write Levelization
0
1
0
1
Disable (normal)
3
2Gb: x4, x8, x16 DDR3 SDRAM
Additive Latency (AL)
Enable
R
Disabled (AL = 0)
TT
2
A2 A1 A0
AL = CL - 1
AL = CL - 2
ODS DLL
Reserved
1
0
Mode Register 1 (MR1)
M5
Address bus
Mode register 1 (MR1)
0
0
1
1
t
MRD and
M0
M1
0
1
© 2006 Micron Technology, Inc. All rights reserved.
0
1
0
1
TT,nom
Output Drive Strength
RZQ/6 (40Ω [NOM])
RZQ/7 (34Ω [NOM])
Enable (normal)
DLL Enable
Disable
Reserved
Reserved
values are available
TT,nom
t
MOD before ini-
write values