MT48H16M16LF MICRON [Micron Technology], MT48H16M16LF Datasheet - Page 31

• Manufacturer Part Number: MT48H16M16LF
• Description: 256Mb: 16 Meg x 16, 8 Meg x 32 Mobile SDRAM
• Manufacturer: MICRON [Micron Technology]

Figure 19:
Figure 20:
PDF:09005aef8219eeeb/Source: 09005aef8219eedd
MT48H16M16LF_2.fm - Rev F 4/07 EN
WRITE Burst
WRITE-to-WRITE
Note:
Note:
COMMAND
COMMAND
Data for any WRITE burst may be truncated with a subsequent READ command, and
data for a fixed-length WRITE burst may be immediately followed by a READ command.
Once the READ command is registered, the data inputs will be ignored, and WRITEs will
not be executed. An example is shown in Figure 21 on page 32. Data n + 1 is either the
last of a burst of two or the last desired of a longer burst.
Data for a fixed-length WRITE burst may be followed by, or truncated with, a
PRECHARGE command to the same bank (provided that auto precharge was not acti-
vated). The PRECHARGE command should be issued
the last desired input data element is registered. The auto precharge mode requires a
t
In addition, when truncating a WRITE burst, the DQM signal must be used to mask
input data for the clock edge prior to, and the clock edge coincident with, the
PRECHARGE command. An example is shown in Figure 21 on page 32. Data n + 1 is
either the last of a burst of two or the last desired of a longer burst. Following the
PRECHARGE command, a subsequent command to the same bank cannot be issued
until
WR of at least one clock plus time (see note 24 on page 52), regardless of frequency.
ADDRESS
ADDRESS
BL = 2. DQM is LOW.
BL = 2. DQM is LOW. Each WRITE command may be to any bank.
CLK
t
CLK
DQ
DQ
RP is met.
WRITE
BANK,
COL n
WRITE
BANK,
COL n
T0
D
D
T0
n
n
IN
IN
NOP
n + 1
T1
n + 1
NOP
D
T1
D
IN
IN
256Mb: 16 Meg x 16, 8 Meg x 32 Mobile SDRAM
DON’T CARE
NOP
WRITE
T2
BANK,
COL b
T2
D
b
IN
31
DON’T CARE
T3
NOP
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
WR after the clock edge at which
©2006 Micron Technology, Inc. All rights reserved.
Operations