mt46h16m16lf Micron Semiconductor Products, mt46h16m16lf Datasheet - Page 48

• Manufacturer Part Number: mt46h16m16lf
• Description: 256mb X16, X32 Mobile Ddr Sdram
• Manufacturer: Micron Semiconductor Products

Power-Down
Figure 33:
PDF: 09005aef82091978 / Source: 09005aef8209195b
MT46H16M16LF__2.fm - Rev. H 3/08 EN
Power-Down Command (in Active or Precharge Modes)
Note:
Power-down (Figure 42 on page 70) is entered when CKE is registered LOW. If power-
down occurs when all banks are idle, this mode is referred to as precharge power-down;
if power-down occurs when there is a row active in any bank, this mode is referred to as
active power-down. Entering power-down deactivates all input and output buffers,
including CK and CK# and excluding CKE. Exiting power-down requires the device to be
at the same voltage as when it entered power-down and received a stable clock.
While in power-down, CKE LOW must be maintained at the inputs of the Mobile DDR
SDRAM, while all other input signals are “Don’t Care.” The power-down state is exited
when CKE is registered HIGH (in conjunction with a NOP or DESELECT command). A
NOP or DESELECT command must be maintained on the command bus until
satisfied.
RAS#, CAS#, WE#
RAS#, CAS#, WE#
The power-down duration is limited by the refresh requirements of the device.
BA0–BA1
A0–A12
CK#
CKE
CS#
CS#
CK
BA0,1
Don’t Care
Or
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Micron Technology, Inc., reserves the right to change products or specifications without notice.
256Mb: x16, x32 Mobile DDR SDRAM
©2005 Micron Technology, Inc. All rights reserved.
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