MT41J256M4JP-125:G Micron Technology Inc, MT41J256M4JP-125:G Datasheet - Page 152

• Manufacturer Part Number: MT41J256M4JP-125:G
• Description: IC DDR3 SDRAM 1GBIT 78FBGA
• Manufacturer: Micron Technology Inc
• Series: -r

Specifications of MT41J256M4JP-125:G

• Format - Memory: RAM
• Memory Type: DDR3 SDRAM
• Memory Size: 1G (256M x 4)
• Speed: 800MHz
• 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: Lead free / RoHS Compliant

Table 74:
Figure 98: Active Power-Down Entry and Exit
PDF: 09005aef826aa906/Source: 09005aef82a357c3
1Gb_DDR3_4.fm - Rev. F 11/08 EN
DRAM State
Active (any bank open)
Precharged
(all banks precharged)
Command
Address
CK#
CKE
CK
Power-Down Modes
Valid
Valid
T0
t IH
t CK
Enter power-down
t IS
MR1[12]
mode
While in either power-down state, CKE is held LOW, RESET# is held HIGH, and a stable
clock signal must be maintained. ODT must be in a valid state but all other input signals
are a “Don’t Care.” If RESET# goes LOW during power-down, the DRAM will switch out of
power-down mode and go into the reset state. After CKE is registered LOW, CKE must
remain LOW until
down duration is
The power-down states are synchronously exited when CKE is registered HIGH (with a
required NOP or DES command). CKE must be maintained HIGH until
satisfied. A valid, executable command may be applied after power-down exit latency,
t
Table 74.
For certain CKE-intensive operations, for example, repeating a power-down exit to
refresh to power-down entry sequence, the number of clock cycles between power-down
exit and power-down entry may not be sufficient enough to keep the DLL properly
updated. In addition to meeting
power-down exit and power-down entry, two other conditions must be met. First,
must be satisfied before issuing the REFRESH command. Second,
fied before the next power-down may be entered. An example is shown in Figure 108 on
page 157.
XP
NOP
“Don’t
Care”
T1
1
0
t CH
t
XPDLL have been satisfied. A summary of the power-down modes is listed in
t CPDED
DLL State
t CL
NOP
Off
On
On
T2
t
PD (MAX) (9 ×
t
PD (MIN) has been satisfied. The maximum time allowed for power-
t PD
Power-Down
Slow
Exit
Fast
Fast
Ta0
t IH
152
t
t
PD when the REFRESH command is used in between
REFI).
Exit power-down
t
t
t
(READ, RDAP, or ODT on)
t
XP to any other valid command
XP to any other valid command
XPDLL to commands that require the DLL to be locked
XP to any other valid command
t IS
Micron Technology, Inc., reserves the right to change products or specifications without notice.
mode
NOP
Ta1
1Gb: x4, x8, x16 DDR3 SDRAM
Relevant Parameters
NOP
Ta2
t CKE (MIN)
Indicates A Break in
Time Scale
t XP
©2006 Micron Technology, Inc. All rights reserved.
NOP
t
Ta3
XPDLL must be satis-
t
CKE has been
Operations
Valid
Valid
Don’t Care
Ta4
t
XP