MT48LC4M16A2TG-8ELIT Micron Technology Inc, MT48LC4M16A2TG-8ELIT Datasheet - Page 31

• Manufacturer Part Number: MT48LC4M16A2TG-8ELIT
• Manufacturer: Micron Technology Inc
• Type: SDRAMr

Specifications of MT48LC4M16A2TG-8ELIT

• Organization: 4Mx16
• Density: 64Mb
• Address Bus: 14b
• Access Time (max): 6ns
• Maximum Clock Rate: 125MHz
• Operating Supply Voltage (typ): 3.3V
• Package Type: TSOP-II
• Operating Temp Range: -40C to 85C
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Supply Current: 120mA
• Pin Count: 54
• Mounting: Surface Mount
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

Figure 20:
PDF: 09005aef80725c0b/Source: 09005aef806fc13c
64MSDRAM_2.fm - Rev. N 12/08 EN
WRITE-to-WRITE
Note:
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 subsequent READ
command. After the READ command is registered, the data inputs will be ignored, and
writes will not be executed. An example is shown in Figure 22 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), and a full-page WRITE burst may be truncated with a PRECHARGE command to
the same bank. The PRECHARGE command should be issued
which the last desired input data element is registered. The auto precharge mode
requires a
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 23 on page 33. 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
In the case of a fixed-length burst being executed to completion, a PRECHARGE
command issued at the optimum time (as described above) provides the same operation
that would result from the same fixed-length burst with auto precharge. The disadvan-
tage of the PRECHARGE command is that it requires that the command and address
buses be available at the appropriate time to issue the command; the advantage of the
PRECHARGE command is that it can be used to truncate fixed-length or full-page bursts.
ADDRESS
DQM is LOW. Each WRITE command may be to any bank.
TRANSITIONING DATA
CLK
DQ
t
WR of at least one clock plus time, regardless of frequency. In addition, when
WRITE
BANK,
COL n
D
T0
n
IN
n + 1
NOP
T1
D
IN
DON’T CARE
WRITE
BANK,
COL b
T2
D
b
IN
31
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
RP is met.
64Mb: x4, x8, x16 SDRAM
t
WR after the clock edge at
©2000 Micron Technology, Inc. All rights reserved.
Commands