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| 型號： | MT48LC4M32LFFC |
| 廠商： | Micron Technology, Inc. |
| 英文描述： | SYNCHRONOUS DRAM |
| 中文描述： | 同步DRAM |
| 文件頁數(shù)： | 15/52頁 |
| 文件大小： | 1281K |
| 代理商： | MT48LC4M32LFFC |
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15
128Mb: x32 SDRAM
128MbSDRAMx32_D.p65 – Rev. D; Pub. 6/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
128Mb: x32
SDRAM
element
n
+ 3 is either the last of a burst of four or the last
desired of a longer burst. This 128Mb SDRAM uses a
pipelined architecture and therefore does not require
the 2
n
rule associated with a prefetch architecture.
A READ command can be initiated on any clock cycle
Figure 7
Consecutive READ Bursts
following a previous READ command. Full-speed ran-
dom read accesses can be performed to the same bank,
as shown in Figure 8, or each subsequent READ may be
performed to a different bank.
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
BANK,
COL
n
NOP
BANK,
COL
b
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
D
OUT
b
READ
X
= 0 cycles
NOTE:
Each READ command may be to either bank. DQM is LOW.
CAS Latency = 1
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
NOP
BANK,
COL
n
NOP
COL
b
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
D
OUT
b
READ
X
= 1 cycle
CAS Latency = 2
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
NOP
BANK,
COL n
NOP
BANK,
COL
b
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
D
OUT
b
READ
NOP
T7
X
= 2 cycles
CAS Latency = 3
DON’T CARE
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