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参数资料
| 型号： | MT48V2M32LFFC |
| 厂商： | Micron Technology, Inc. |
| 英文描述： | 512K x 32 x 4 banks 2.5V SDRAM(2.5V,512K x 32 x 4组同步动态RAM) |
| 中文描述： | 为512k × 32 × 4银行2.5V的内存电压（2.5V，512K采样× 32 × 4组同步动态RAM）的 |
| 文件页数： | 19/50页 |
| 文件大小： | 1058K |
| 代理商： | MT48V2M32LFFC |
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19
64Mb: x32 SDRAM, 2.5V
BatRam_25V.p65 – Rev. 0.7, Pub. 2/01
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2001, Micron Technology, Inc.
64Mb: x32, 2.5V
SDRAM
PRELIMINARY
Figure 15
WRITE To WRITE
Figure 14
WRITE Burst
Figure 13
WRITE Command
CS#
WE#
CAS#
RAS#
CKE
CLK
COLUMN
DON’T CARE
HIGH
ENABLE AUTO PRECHARGE
DISABLE AUTO PRECHARGE
ABANK
A0–A7
A10
BA0, 1
A8, A9
VALID ADDRESS
CLK
DQ
D
IN
n
T2
T1
T3
T0
COMMAND
ADDRESS
NOP
NOP
WRITE
D
IN
n
+ 1
NOP
BANK,
COL
n
NOTE:
Burst length = 2. DQM is LOW.
CLK
DQ
T2
T1
T0
COMMAND
ADDRESS
NOP
WRITE
WRITE
BANK,
COL
n
BANK,
COL
b
D
IN
n
D
IN
n
+ 1
D
IN
b
NOTE:
DQM is LOW.
Each WRITE
command may be to any bank.
WRITEs
WRITE bursts are initiated with a WRITE command,
as shown in Figure 13.
The starting column and bank addresses are pro-
vided with the WRITE command, and auto precharge
is either enabled or disabled for that access. If auto
precharge is enabled, the row being accessed is
precharged at the completion of the burst. For the ge-
neric WRITE commands used in the following illustra-
tions, auto precharge is disabled.
During WRITE bursts, the first valid data-in ele-
ment will be registered coincident with the WRITE com-
mand. Subsequent data elements will be registered on
each successive positive clock edge. Upon completion
of a fixed-length burst, assuming no other commands
have been initiated, the DQs will remain High-Z and
any additional input data will be ignored (see Figure
14). A full-page burst will continue until terminated.
(At the end of the page, it will wrap to column 0 and
continue.)
Data for any WRITE burst may be truncated with a
subsequent WRITE command, and data for a fixed-
length WRITE burst may be immediately followed by
data for a WRITE command. The new WRITE command
can be issued on any clock following the previous WRITE
command, and the data provided coincident with the
new command applies to the new command. An ex-
ample is shown in Figure 15. Data
n
+ 1 is either the last
of a burst of two or the last desired of a longer burst.
This 64Mb SDRAM uses a pipelined architecture and
therefore does not require the 2
n
rule associated with a
prefetch architecture. A WRITE command can be initi-
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